Rhizotaxis - Rhythm
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Rhizotaxis (?), n. [NL., fr. Gr. ��� a root + ��� arrangement.] (Bot.) The arrangement of the roots of plants.
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Rhob (rŏb), n. See 1st .
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Rhodammonium (?), a. (Chem.) Pertaining to, derived from, or containing, rhodium and ammonia; -- said of certain complex compounds.
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Rhodanate (?), n. (Chem.) A salt of rhodanic acid; a sulphocyanate. [Obsoles.]
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Rhodanic (?), a. [Gr. ��� the rose.] (Chem.) Pertaining to, or designating, an acid (commonly called sulphocyanic acid) which frms a red color with ferric salts. [Obsoles.]
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Rhodeoretin (?), n. [Gr. ��� the rose + ��� resin.] (Chem.) Same as .
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Rhodian (?), a. [L. Rhodius: cf. F. rhodien.] Of or pertaining to Rhodes, an island of the Mediterranean. -- n. A native or inhabitant of Rhodes.
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Rhodic (?), a. (Chem.) Of or pertaining to rhodium; containing rhodium.
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Rhodium (?), n. [NL., fr. Gr. rodon the rose. So called from the rose-red color of certain of its solutions. See .] (Chem.) A rare element of the light platinum group. It is found in platinum ores, and obtained free as a white inert metal which it is very difficult to fuse. Symbol Rh. Atomic weight 104.1. Specific gravity 12.
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Rhodizonic (?), a. [Gr. ��� to be rose-red.] (Chem.) Pertaining to, or designating, a colorless crystalline substance (called rhodizonic acid, and carboxylic acid) obtained from potassium carboxide and from certain quinones. It forms brilliant red, yellow, and purple salts.
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Rhodochrosite (?), n. [Gr. rodon the rose + ��� a coloring.] (Min.) Manganese carbonate, a rose-red mineral sometimes occuring crystallized, but generally massive with rhombohedral cleavage like calcite; -- called also dialogite.
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Rhodocrinite (?), n. [Gr. rodon rose + ��� lily.] (Paleon.) A rose encrinite.
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Rhododendron (?), n. [L., fr. Gr. rododendron, literally, rose tree; rodon rose + dendron tree. See .] (Bot.) A genus of shrubs or small trees, often having handsome evergreen leaves, and remarkable for the beauty of their flowers; rosebay.
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Rhodomontade (?), n. See .
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Rhodomontader (?), n. See .
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Rhodonite (?), n. [Gr. rodon the rose. ] (Min.) Manganese spar, or silicate of manganese, a mineral occuring crystallised and in rose-red masses. It is often used as an ornamental stone.
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Rhodophane (?), n. [Gr. rodon the rose + ��� to show.] (Physiol.) The red pigment contained in the inner segments of the cones of the retina in animals. See . W. KÜhne.
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Rhodopsin (?), n. [Gr. rodon rose + wps eye.] (Physiol.) The visual purple. See under .
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Rhodosperm (?), n. [Gr. rodon the rose + sperma a seed.] (Bot.) Any seaweed with red spores.
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☞ As the name of a subclass, Rhodosperms, or Rhodospermeæ, is synonymous with Florideæ (which see.)
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Rhomb (rŏmb or rŏm; 277), n. [L. rhombus, Gr. rombos rhomb, a spinning top, magic wheel, fr. rembein to turn or whirl round, perhaps akin to E. wrench: cf. F. rhombe. Cf. , .] 1. (Geom.) An equilateral parallelogram, or quadrilateral figure whose sides are equal and the opposite sides parallel. The angles may be unequal, two being obtuse and two acute, as in the cut, or the angles may be equal, in which case it is usually called a square.
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2. (Geom.) A rhombohedron.
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Coloq. Fresnel's rhomb (Opt.), a rhomb or oblique parallelopiped of crown or St. Gobain glass so cut that a ray of light entering one of its faces at right angles shall emerge at right angles at the opposite face, after undergoing within the rhomb, at other faces, two reflections. It is used to produce a ray circularly polarized from a plane-polarized ray, or the reverse. Nichol.
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Rhombic (?), a. 1. Shaped like a rhomb.
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2. (Crystallog.) Same as .
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Rhomboganoid (?), n. [Rhomb + ganoid.] (Zoöl.) A ganoid fish having rhombic enameled scales; one of the Rhomboganoidei.
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Rhomboganoidei (?), n. pl. [NL.] (Zoöl.) Same as .
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Rhombogene (rŏmb�jēn), n. [Rhomb + root of Gr. gignesqai to be born.] (Zoöl.) A dicyemid which produces infusorialike embryos; -- opposed to nematogene. See . [Written also rhombogen.]
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Rhombohedral (?), a. (Geom. & Crystallog.) Related to the rhombohedron; presenting the form of a rhombohedron, or a form derivable from a rhombohedron; relating to a system of forms including the rhombohedron and scalenohedron.
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Coloq. Rhombohedral iron ore (Min.) See . -- Coloq. Rhombohedral system (Crystallog.), a division of the hexagonal system embracing the rhombohedron, scalenohedron, etc.
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Rhombohedric (?), a. (Geom. & Crystallog.) Rhombohedral.
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Rhombohedron (?), n. [NL., fr. Gr. ��� rhomb + ��� seat, base.] (Geom. & Crystallog.) A solid contained by six rhomboids; a parallelopiped.
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Rhomboid (rŏmboid), n. [Gr. ��� rhomboidal; ��� rhomb + e'i^dos shape: cf. F. rhomboïde.] (Geom.) An oblique-angled parallelogram like a rhomb, but having only the opposite sides equal, the length and with being different.
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Rhomboid (rŏmboid), a. Same as .
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Rhomboidal (?), a. [Cf. F. rhomboïdal.] Having, or approaching, the shape of a rhomboid.
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Rhomboides (?), n. A rhomboid. [R.] Milton.
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Rhomboid-ovate (?), a. Between rhomboid and ovate, or oval, in shape.
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Rhomb spar (?). (Min.) A variety of dolomite.
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Rhombus (?), n. [L.] Same as , 1.
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Rhonchal (?), a. (Med.) Rhonchial.
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Rhonchial (?), a. (Med.) Of or pertaining to a rhonchus; produced by rhonchi.
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Coloq. Rhonchial fremitus . [L. fremitus a dull roaring or murmuring.] (Med.) A vibration of the chest wall that may be felt by the hand laid upon its surface. It is caused in the production of rhonchi in the bronchial tubes.
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Rhonchisonant (?), a. [L. rhonchus a snoring + sonans, p. pr. of sonare to sound.] Making a snorting noise; snorting. [R.]
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Rhonchus (?), n.; pl. Rhonchi (#). [L., a snoring, a croaking.] (Med.) An adventitious whistling or snoring sound heard on auscultation of the chest when the air channels are partially obstructed. By some writers the term rhonchus is used as equivalent to râle in its widest sense. See .
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Rhopalic (?), a. [Gr. ���� club-shaped; fr. ��� a club: cf. F. rhopalique.] (Pros.) Applied to a line or verse in which each successive word has one more syllable than the preceding.
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Rhopalium (?), n.; pl. Rhopalia (#). [NL.] (Zoöl.) One of the marginal sensory bodies of medusæ belonging to the Discophora.
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Rhopalocera (?), n. pl. [NL., from Gr. ��� a club + ��� ahorn.] (Zoöl.) A division of Lepidoptera including all the butterflies. They differ from other Lepidoptera in having club-shaped antennæ.
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Rhotacism (?), n. [Gr. rwtakizein to use the letter r (ρ) overmuch: cf. F. rhotacisme.] An oversounding, or a misuse, of the letter r; specifically (Phylol.), the tendency, exhibited in the Indo-European languages, to change s to r, as wese to were.
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Rhubarb (?), n. [F. rhubarbe, OF. rubarbe, rheubarbe, reubarbare, reobarbe, LL. rheubarbarum for rheum barbarum, Gr. ��� (and ��) rhubarb, from the river Rha (the Volga) on whose banks it grew. Originally, therefore, it was the barbarian plant from the Rha. Cf. , .] 1. (Bot.) The name of several large perennial herbs of the genus Rheum and order Polygonaceæ.
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2. The large and fleshy leafstalks of Rheum Rhaponticum and other species of the same genus. They are pleasantly acid, and are used in cookery. Called also pieplant.
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3. (Med.) The root of several species of Rheum, used much as a cathartic medicine.
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Coloq. Monk's rhubarb . (Bot.) See under . -- Coloq. Turkey rhubarb (Med.), the roots of Rheum Emodi.
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Rhubarby (?), a. Like rhubarb.
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Rhumb (?), n. [F. rumb, Sp. rumbo, or Pg. rumbo, rumo, probably fr. Gr. ��� a magic wheel, a whirling motion, hence applied to a point of the compass. See .] (Navigation) A line which crosses successive meridians at a constant angle; -- called also rhumb line, and loxodromic curve. See .
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Coloq. To sail on a rhumb , to sail continuously on one course, following a rhumb line.
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Rhus (?), n. [L., sumac, fr. Gr. ���.] (Bot.) A genus of shrubs and small treets. See .
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Rhusma (?), n. [See .] A mixtire of caustic lime and orpiment, or tersulphide of arsenic, -- used in the depilation of hides. Knight.
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Rhyme (?), n. [OE. ryme, rime, AS. rīm number; akin to OHG. rīm number, succession, series, G. reim rhyme. The modern sense is due to the influence of F. rime, which is of German origin, and originally the same word.] [The Old English spelling rime is becoming again common. See Note under .] 1. An expression of thought in numbers, measure, or verse; a composition in verse; a rhymed tale; poetry; harmony of language. “Railing rhymes.” Daniel.
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A ryme I learned long ago.
Chaucer.
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He knew
Himself to sing, and build the lofty rime.
Milton.
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2. (Pros.) Correspondence of sound in the terminating words or syllables of two or more verses, one succeeding another immediately or at no great distance. The words or syllables so used must not begin with the same consonant, or if one begins with a vowel the other must begin with a consonant. The vowel sounds and accents must be the same, as also the sounds of the final consonants if there be any.
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For rhyme with reason may dispense,
And sound has right to govern sense.
Prior.
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3. Verses, usually two, having this correspondence with each other; a couplet; a poem containing rhymes.
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4. A word answering in sound to another word.
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Coloq. Female rhyme . See under . -- Coloq. Male rhyme . See under . -- Coloq. Rhyme or reason , sound or sense. -- Coloq. Rhyme royal (Pros.), a stanza of seven decasyllabic verses, of which the first and third, the second, fourth, and fifth, and the sixth and seventh rhyme.
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Rhyme (?), v. i. [imp. & p. p. Rhymed (?);p. pr. & vb. n. Rhyming.] [OE. rimen, rymen, AS. rīman to count: cf. F. rimer to rhyme. See , n.] 1. To make rhymes, or verses. “Thou shalt no longer ryme.” Chaucer.
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There marched the bard and blockhead, side by side,
Who rhymed for hire, and patronized for pride.
Pope.
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2. To accord in rhyme or sound.
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And, if they rhymed and rattled, all was well.
Dryden.
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Rhyme, v. t. 1. To put into rhyme. Sir T. Wilson.
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2. To influence by rhyme.
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Hearken to a verser, who may chance
Rhyme thee to good.
Herbert.
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Rhymeless, a. Destitute of rhyme. Bp. Hall.
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Rhymer (?), n. One who makes rhymes; a versifier; -- generally in contempt; a poor poet; a poetaster.
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This would make them soon perceive what despicaple creatures our common rhymers and playwriters be.
Milton.
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Rhymery (?), n. The art or habit of making rhymes; rhyming; -- in contempt.
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Rhymester (?), n. A rhymer; a maker of poor poetry. Bp. Hall. Byron.
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Rhymic (?), a. Pertaining to rhyme.
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Rhymist, n. A rhymer; a rhymester. Johnston.
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Rhynchobdellea (?), n. pl. [NL., fr. Gr. rygchos snout + ��� a leech.] (Zoöl.) A suborder of leeches including those that have a protractile proboscis, without jaws. Clepsine is the type.
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Rhynchocephala (?), n. pl. [NL., fr. Gr. rygchos snout + kefalh head.] (Zoöl.) An order of reptiles having biconcave vertebræ, immovable quadrate bones, and many other peculiar osteological characters. Hatteria is the only living genus, but numerous fossil genera are known, some of which are among the earliest of reptiles. See . Called also Rhynchocephalia.
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Rhynchocœla (?), n. pl. [NL., fr. Gr. rygchos snout + koilos hollow.] (Zoöl.) Same as . -- Rhynchocœlous (#), a.
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Rhyncholite (�), n. [Gr. rygchos snout, beak + -lie: cf. F. rhyncholithe.] (Paleon.) A fossil cephalopod beak.
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Rhynchonella (�), n. [NL., fr. Gr. rygchos snout.] (Zoöl.) A genus of brachiopods of which some species are still living, while many are found fossil.
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Rhynchophora (�), n. pl. [NL., fr. Gr. rygchos snout + ferein to carry.] (Zoöl.) A group of Coleoptera having a snoutlike head; the snout beetles, curculios, or weevils.
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Rhynchophore (?), n. (Zoöl.) One of the Rhynchophora.
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Rhynchota (?), n. pl. [NL., fr. Gr. rygchos snout.] (Zoöl.) Same as . [Written also Rhyncota.]
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Rhyolite (?), n. [Gr. rei^n to flow + -lite.] (Min.) A quartzose trachyte, an igneous rock often showing a fluidal structure. -- Rhyolitic, (#), a.
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Rhyparography (?), n. [Gr. ���� painting foul or mean objects; ryparos filthy, dirty + grafein to write, paint.] In ancient art, the painting of genre or still-life pictures.
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Rhysimeter (?), n. [Gr. ��� flow + -meter.] An instrument, acting on the principle of Pitot's tube, for measuring the velocity of a fluid current, the speed of a ship, etc.
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Rhythm (?), n. [F. rhythme, rythme, L. rhythmus, fr. Gr. ��� measured motion, measure, proportion, fr. rei^n to flow. See .] 1. In the widest sense, a dividing into short portions by a regular succession of motions, impulses, sounds, accents, etc., producing an agreeable effect, as in music poetry, the dance, or the like.
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2. (Mus.) Movement in musical time, with periodical recurrence of accent; the measured beat or pulse which marks the character and expression of the music; symmetry of movement and accent. Moore (Encyc.)
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3. A division of lines into short portions by a regular succession of arses and theses, or percussions and remissions of voice on words or syllables.
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4. The harmonious flow of vocal sounds.
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