Part 736

Cy`a*nu"ric (s?`?-n?"r?k), a. [Cyanic + uric: Cf. F. cyanurique.] (Chem.) Pertaining to, or derived from, cyanic and uric acids.

Cyanuric acid (Chem.), an organic acid, C3O3N3H3, first obtained by heating uric acid or urea, and called pyrouric acid; afterwards obtained from isocyanic acid. It is a white crystalline substance, odorless and almost tasteless; -- called also tricarbimide.

Cy*ath"i*form (s?-?th"?-f?rm), a. [L. cyathus a cup (Gr, ky`aqos) - form:cf. F. cyathiforme.] In the form of a cup, a little widened at the top.

Cy*ath"olith (s?-?th"?-l?th), n. [Gr. ky`aqos a cup + -lith.] (Biol.) A kind of coccolith, which in shape resembles a minute cup widened at the top, and varies in size from &frac1x6000; to &frac1x8000; of an inch.

Cy`a*tho*phyl"loid (s?`?-th?-f?l"loid), a. [NL. cyathophyllum, fr. Gr. ky`aqos a cup + fy`llon a leaf.] (Paleon.) Like, or pertaining to, the family CyathophyllidŠ.

Cy`a*tho*phyl"loid, n. (Paleon.) A fossil coral of the family CyathophyllidŠ; sometimes extended to fossil corals of other related families belonging to the group Rugosa; -- also called cup corals. Thay are found in paleozoic rocks.

Cy"cad (sī"kăd), n. (Bot.) Any plant of the natural order CycadaceŠ, as the sago palm, etc.

Cyc`a*da"ceous (s?k`?-d?"sh?s or s?`k?-), a. (Bot.) Pertaining to, or resembling, an order of plants like the palms, but having exogenous wood. The sago palm is an example.

Cy"cas (s?"k?s), n. [Of uncertain origin. LinnŠus derives it from one of the "obscure Greek words."] (Bot.) A genus of trees, intermediate in character between the palms and the pines. The pith of the trunk of some species furnishes a valuable kind of sago.

Cyc"la*men (s?k"l?-m?n), n. [NL., fr. Gr. kykla`minos, kyklami`s.] (Bot.) A genus of plants of the Primrose family, having depressed rounded corms, and pretty nodding flowers with the petals so reflexed as to point upwards, whence it is called rabbits' ears. It is also called sow bread, because hogs are said to eat the corms.

Cyc"la*min (-m?n), n. A white amorphous substance, regarded as a glucoside, extracted from the corm of Cyclamen EuropŠum.

Cy"clas (s?"kl?s), n. [Cf. Ciclatoun.] A long gown or surcoat (cut off in front), worn in the Middle Ages. It was sometimes embroidered or interwoven with gold. Also, a rich stuff from which the gown was made.

Cy"cle (s?"k'l), n. [F. ycle, LL. cyclus, fr. Gr. ky`klos ring or circle, cycle; akin to Skr. cakra wheel, circle. See Wheel.] 1. An imaginary circle or orbit in the heavens; one of the celestial spheres. Milton.

2. An interval of time in which a certain succession of events or phenomena is completed, and then returns again and again, uniformly and continually in the same order; a periodical space of time marked by the recurrence of something peculiar; as, the cycle of the seasons, or of the year.

Wages . . . bear a full proportion . . . to the medium of provision during the last bad cycle of twenty years. Burke.

3. An age; a long period of time.

Better fifty years of Europe than a cycle of Cathay. Tennyson.

4. An orderly list for a given time; a calendar. [Obs.]

We . . . present our gardeners with a complete cycle of what is requisite to be done throughout every month of the year. Evelyn.

5. The circle of subjects connected with the exploits of the hero or heroes of some particular period which have served as a popular theme for poetry, as the legend of Arthur and the knights of the Round Table, and that of Charlemagne and his paladins.

6. (Bot.) One entire round in a circle or a spire; as, a cycle or set of leaves. Gray.

7. A bicycle or tricycle, or other light velocipede.

Calippic cycle, a period of 76 years, or four Metonic cycles; -- so called from Calippus, who proposed it as an improvement on the Metonic cycle. -- Cycle of eclipses, a period of about 6,586 days, the time of revolution of the moon's node; -- called Saros by the Chaldeans. -- Cycle of indiction, a period of 15 years, employed in Roman and ecclesiastical chronology, not founded on any astronomical period, but having reference to certain judicial acts which took place at stated epochs under the Greek emperors. -- Cycle of the moon, or Metonic cycle, a period of 19 years, after the lapse of which the new and full moon returns to the same day of the year; -- so called from Meton, who first proposed it. -- Cycle of the sun, Solar cycle, a period of 28 years, at the end of which time the days of the month return to the same days of the week. The dominical or Sunday letter follows the same order; hence the solar cycle is also called the cycle of the Sunday letter. In the Gregorian calendar the solar cycle is in general interrupted at the end of the century.

Cy"cle (s?"k'l), v. i. [imp. & p. p. Cycled. (-k'ld); p. pr. & vb. n. Cycling (-kl&?;ng).] 1. To pass through a cycle of changes; to recur in cycles. Tennyson. Darwin.

2. To ride a bicycle, tricycle, or other form of cycle.

{ Cyc"lic (s?k"l?k or s?"kl?k), Cyc"lic*al (s?k"l?-kal), } a. [Cf. F. cycluque, Gr. kykliko`s, fr. ky`klos See Cycle.] Of or pertaining to a cycle or circle; moving in cycles; as, cyclical time. Coleridge.

Cyclic chorus, the chorus which performed the songs and dances of the dithyrambic odes at Athens, dancing round the altar of Bacchus in a circle. -- Cyclic poets, certain epic poets who followed Homer, and wrote merely on the Trojan war and its heroes; -- so called because keeping within the circle of a single subject. Also, any series or coterie of poets writing on one subject. Milman.

Cy"clide (s?"kl?d), n. [Gr. ky`klos circle.] (Geom.) A surface of the fourth degree, having certain special relations to spherical surfaces. The tore or anchor ring is one of the cyclides.