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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.

4. The harmonious flow of vocal sounds.

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Rhyth"mer (rth"mr or r"-), n. One who writes in rhythm, esp. in poetic rhythm or meter. [R.]

One now scarce counted a rhythmer, formerly admitted for a poet.

Fuller.

{ Rhyth"mic (-mk), Rhyth"mic*al (- m*kal), } a. [Gr. &?;&?;&?;&?;: cf. L. rhythmicus, F. rhythmique.] Pertaining to, or of the nature of, rhythm

Day and night I worked my rhythmic thought.

Mrs. Browning.

Rhythmical accent. (Mus.) See Accent, n., 6 (c).

Rhyth"mic*al*ly, adv. In a rhythmical manner.

Rhyth"mics (?), n. The department of musical science which treats of the length of sounds.

Rhyth"ming (?), a. Writing rhythm; verse making. "The rhythming monk." Fuller.

Rhythm"less (?), a. Being without rhythm. Coleridge.

Rhyth*mom"e*ter (?), n. [Rhythm + -meter.] An instrument for marking time in musical movements. See Metronome.

||Rhyth"mus (?), n. [L.] Rhythm.

||Rhyt"i*na (?), n. (Zoöl.) See Rytina.

Ri"al (&?;), n. A Spanish coin. See Real. [Obs.]

Ri*al", a. Royal. [Obs.] Chaucer.

Ri"al (?), n. [From Royal.] A gold coin formerly current in England, of the value of ten shillings sterling in the reign of Henry VI., and of fifteen shillings in the reign of Elizabeth. [Spelt also ryal.] Brande & C.

||Ri`ant" (?), a. [F. riant, p. pr. of rire to laugh, L. ridere.] ||Laughing; laughable; exciting gayety; gay; merry; delightful to the ||view, as a landscape.

In such cases the sublimity must be drawn from the other sources, with a strict caution, howewer, against anything light and riant.

Burke.

Rib (?), n. [AS. rib, ribb; akin to D. rib, G. rippe, OHG. rippa, rippi, Dan. ribbe, Icel. rif, Russ. rebro.] 1. (Anat.) One of the curved bones attached to the vertebral column and supporting the lateral walls of the thorax.

In man there are twelve ribs on each side, of which the upper seven are directly connected with the sternum by cartilages, and are called sternal, or true, ribs. The remaining five pairs are called asternal, or false, ribs, and of these each of the three upper pairs is attached to the cartilage of the rib above, while the two lower pairs are free at the ventral ends, and are called floating ribs. See Thorax.

2. That which resembles a rib in form or use. Specifically: (a) (Shipbuilding) One of the timbers, or bars of iron or steel, that branch outward and upward from the keel, to support the skin or planking, and give shape and strength to the vessel. (b) (Mach. & Structures) A ridge, fin, or wing, as on a plate, cylinder, beam, etc., to strengthen or stiffen it. (c) One of the rods on which the cover of an umbrella is extended. (d) A prominent line or ridge, as in cloth. (e) A longitudinal strip of metal uniting the barrels of a double-barreled gun.

3. (Bot.) The chief nerve, or one of the chief nerves, of a leaf. (b) Any longitudinal ridge in a plant.

4. (Arch.) (a) In Gothic vaulting, one of the primary members of the vault. These are strong arches, meeting and crossing one another, dividing the whole space into triangles, which are then filled by vaulted construction of lighter material. Hence, an imitation of one of these in wood, plaster, or the like. (b) A projecting mold, or group of moldings, forming with others a pattern, as on a ceiling, ornamental door, or the like.