a. [ Pref. a- not + cyclic. ] Not cyclic; not disposed in cycles or whorls; as: (a) (Bot.) Of a flower, having its parts inserted spirally on the receptacle. (b) (Org. Chem.) Having an open-chain structure; aliphatic. [ Webster 1913 Suppl. ]

a. (Org. Chem.) pertaining to compounds that have a ring in the structure, but are not aromatic, as cyclohexane or cyclohexene. Compare aliphatic and aromatic. [ PJC. ]

n. (Meteorol.) A movement of the atmosphere opposite in character, as regards direction of the wind and distribution of barometric pressure, to that of a cyclone. -- An`ti*cy*clon"ic a. -- An`ti*cy*clon"ic*al*ly adv. [ 1913 Webster ]

adj. 1. of or pertaining to an anticyclone; moving in the opposite direction of a cyclone. [ WordNet 1.5 ]

n. [ Gr. ba`ros weight + cyclone + -meter. ] (Meteorol.) An aneroid barometer for use with accompanying graphic diagrams and printed directions designed to aid mariners to interpret the indications of the barometer so as to determine the existence of a violent storm at a distance of several hundred miles. [ Webster 1913 Suppl. ]

n. [ Pref. bi- + cycle. ] A light vehicle having two wheels one behind the other. It has a saddle seat and is propelled by the rider's feet acting on cranks or levers. [ 1913 Webster ]

n. One who rides a bicycle. [ 1913 Webster ]

a. Relating to bicycles. [ 1913 Webster ]

n. The use of a bicycle; the act or practice of riding a bicycle. [ 1913 Webster ]

n. The art of riding a bicycle. [ 1913 Webster ]

n. A bicycler. [ 1913 Webster ]

[ After N. L. S. Carnot, French physicist. ] (Thermodynamics) An ideal heat-engine cycle in which the working fluid goes through the following four successive operations: (1) Isothermal expansion to a desired point; (2) adiabatic expansion to a desired point; (3) isothermal compression to such a point that (4) adiabatic compression brings it back to its initial state. [ Webster 1913 Suppl. ]

n. a yellow crystalline antibacterial antibiotic used to treat certain bacterial and rickettsial diseases. Aureomycin is one common trademark for chlortetracycline.
Syn. -- Aureomycin. [ WordNet 1.5 ]

n. 1. the pre-Mycenaean civilization on the Cyclades islands in the S Aegean sea.
Syn. -- Cycladic civilization, Cycladic culture. [ WordNet 1.5 ]

2. an archipelago consisting of over 200 islands in the southern Aegean sea. [ WordNet 1.5 ]

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. [ 1913 Webster ]

n. A white amorphous substance, regarded as a glucoside, extracted from the corm of Cyclamen Europæum. [ 1913 Webster ]

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. [ 1913 Webster ]

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. [ 1913 Webster ]

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. [ 1913 Webster ]

Wages . . . bear a full proportion . . . to the medium of provision during the last bad cycle of twenty years. Burke. [ 1913 Webster ]

3. An age; a long period of time. [ 1913 Webster ]

Better fifty years of Europe than a cycle of Cathay. Tennyson. [ 1913 Webster ]

4. An orderly list for a given time; a calendar. [ Obs. ] [ 1913 Webster ]

We . . . present our gardeners with a complete cycle of what is requisite to be done throughout every month of the year. Evelyn. [ 1913 Webster ]

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. [ 1913 Webster ]

6. (Bot.) One entire round in a circle or a spire; as, a cycle or set of leaves. Gray. [ 1913 Webster ]

7. A bicycle or tricycle, or other light velocipede. [ 1913 Webster ]

8. A motorcycle. [ PJC ]

9. (Thermodynamics) A series of operations in which heat is imparted to (or taken away from) a working substance which by its expansion gives up a part of its internal energy in the form of mechanical work (or being compressed increases its internal energy) and is again brought back to its original state. [ Webster 1913 Suppl. ]

10. (Technology) A complete positive and negative, or forward and reverse, action of any periodic process, such as a vibration, an electric field oscillation, or a current alternation; one period. Hence: (Elec.) A complete positive and negative wave of an alternating current. The number of cycles (per second) is a measure of the frequency of an alternating current. [ Webster 1913 Suppl. + PJC ]

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. [ 1913 Webster ]

v. i. [ imp. & p. p. Cycled. p. pr. & vb. n. Cycling ] 1. To pass through a cycle{ 2 } of changes; to recur in cycles. Tennyson. Darwin. [ 1913 Webster ]

2. To ride a bicycle, tricycle, or other form of cycle. [ 1913 Webster ]

v. t. To cause to pass through a cycle{ 2 }. [ PJC ]

{ } a. [ Cf. F. cycluque, Gr. kykliko`s, fr. ky`klos See Cycle. ] 1. Of or pertaining to a cycle or circle; moving in cycles; as, cyclical time. Coleridge. [ 1913 Webster ]

2. (Chemistry) Having atoms bonded to form a ring structure. Opposite of acyclic. Used most commonly in respect to organic compounds. [ Narrower terms: bicyclic; heterocyclic; homocyclic, isocyclic ]
Syn. -- closed-chain, closed-ring. [ WordNet 1.5 ]

3. Recurring in cycles{ 2 }; having a pattern that repeats at approximately equal intervals; periodic. Opposite of noncyclic. [ Narrower terms: alternate(prenominal), alternating(prenominal); alternate(prenominal), every other(prenominal), every second(prenominal); alternating(prenominal), oscillating(prenominal); biyearly; circadian exhibiting 24-hour periodicity); circular; daily, diurnal; fortnightly, biweekly; hourly; midweek, midweekly; seasonal; semestral, semestrial; semiannual, biannual, biyearly; semiweekly, biweekly; weekly; annual, yearly; biennial; bimonthly, bimestrial; half-hourly; half-yearly; monthly; tertian, alternate(prenominal); triennial ] [ WordNet 1.5 ]

4. Marked by repeated cycles{ 2 }. [ WordNet 1.5 ]

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. [ 1913 Webster ]

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. [ 1913 Webster ]

n. The act, art, or practice, of riding a cycle, esp. a bicycle or tricycle. [ 1913 Webster ]

n. A cycler. [ 1913 Webster ]

[ Gr. ky`klos circle, wheel. ] A combining form meaning circular, of a circle or wheel. [ 1913 Webster ]

a. [ Cyclo- + branchiate. ] (Zool) Having the gills around the margin of the body, as certain limpets. [ 1913 Webster ]

a. (Zool.) Of or pertaining to the Cycloganoidei. [ 1913 Webster ]

n. (Zool.) One of the Cycloganoidei. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. ky`klos circle + NL. ganoidei. See Ganoid. ] (Zool.) An order of ganoid fishes, having cycloid scales. The bowfin (Amia calva) is a living example. [ 1913 Webster ]

n. [ Cyclo- + -graph. ] See Arcograph. [ 1913 Webster ]

n. [ Cyclo- + -oid: cf. F. cycloïde. ] (Geom.) A curve generated by a point in the plane of a circle when the circle is rolled along a straight line, keeping always in the same plane. [ 1913 Webster ]

☞ The common cycloid is the curve described when the generating point (p) is on the circumference of the generating circle; the curtate cycloid, when that point lies without the circumference; the prolate or inflected cycloid, when the generating point (p) lies within that circumference. [ 1913 Webster ]

a. (Zool.) Of or pertaining to the Cycloidei. [ 1913 Webster ]

Cycloid scale (Zool.), a fish scale which is thin and shows concentric lines of growth, without serrations on the margin. [ 1913 Webster ]

n. (Zool.) One of the Cycloidei. [ 1913 Webster ]

a. Pertaining to, or resembling, a cycloid; as, the cycloidal space is the space contained between a cycloid and its base. [ 1913 Webster ]

Cycloidal engine. See Geometric lathe. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. ky`klos circle + -oid. ] (Zool.) An order of fishes, formerly proposed by Agassiz, for those with thin, smooth scales, destitute of marginal spines, as the herring and salmon. The group is now regarded as artificial. [ 1913 Webster ]

a. & n. (Zool.) Same as 2d and 3d Cycloid. [ 1913 Webster ]

n. [ Cyclo- + -meter. ] A contrivance for recording the revolutions of a wheel, as of a bicycle. [ 1913 Webster ]

n. [ Cyclo- + -metry: cf. F. cyclométrie. ] (Geom.) The art of measuring circles. [ 1913 Webster ]

n. [ Gr.&unr_;&unr_;&unr_;&unr_;&unr_; moving in a circle, p. pr. of &unr_;&unr_;&unr_;&unr_;&unr_;, fr. ky`klos circle. ] 1. (Meteor.) A violent storm, often of vast extent, characterized by high winds rotating about a calm center of low atmospheric pressure. This center moves onward, often with a velocity of twenty or thirty miles an hour. [ 1913 Webster ]

☞ The atmospheric disturbance usually accompanying a cyclone, marked by an onward moving area of high pressure, is called an anticyclone. [ 1913 Webster ]

2. (Meteor.) In general, a condition of the atmosphere characterized by a central area of pressure much lower than that of surrounding areas, and a system of winds blowing inward and around (clockwise in the southern hemisphere and counter-clockwise in the northern); -- called also a low-area storm. It is attended by high temperature, moist air, abundant precipitation, and clouded sky. The term includes the hurricane, typhoon, and tropical storms; it should not be applied to the moderate disturbances attending ordinary areas of low pressure nor to tornadoes, waterspouts, or “twisters, ” in which the vertical motion is more important than the horizontal. [ Webster 1913 Suppl. ]

3. A tornado. See above, and Tornado. [ Middle U. S. ] [ Webster 1913 Suppl. ]

{ or }. A cellar or excavation used for refuge from a cyclone, or tornado. [ Middle U. S. ] [ Webster 1913 Suppl. ]

a. Pertaining to a cyclone. [ 1913 Webster ]

n. [ Cyclone + -scope. ] An apparatus to assist in locating the center of a cyclone. [ Webster 1913 Suppl. ]

n. See Note under Cyclops, 1. [ 1913 Webster ]

{ } n. [ NL., from Gr. ky`klos circle + paidei`a the bringing up of a child, education, erudition, fr. paidey`ein to bring up a child. See Cycle, and cf. Encyclopedia, Pedagogue. ] 1. The circle or compass of the arts and sciences (originally, of the seven so-called liberal arts and sciences); circle of human knowledge. [ 1913 Webster ]

2. Hence: A work containing, in alphabetical order, information in all departments of knowledge, or on a particular department or branch; as, a cyclopedia of the physical sciences, or of mechanics; an encyclopedia. See Encyclopedia. [ PJC ]

a. [ L. Cyclopeus, Gr. &unr_;&unr_;&unr_;&unr_;&unr_;, fr. &unr_;&unr_;&unr_;&unr_;&unr_; Cyclops: cf. F. cyclopeen. ] Pertaining to the Cyclops; characteristic of the Cyclops; huge; gigantic; vast and rough; massive; as, Cyclopean labors; Cyclopean architecture. [ 1913 Webster ]

a. Belonging to the circle of the sciences, or to a cyclopedia; of the nature of a cyclopedia; hence, of great range, extent, or amount; as, a man of cyclopedic knowledge. [ 1913 Webster ]

n. A maker of, or writer for, a cyclopedia. [ 1913 Webster ]

n. a genus of tropical Old World ferns having closely crowded circular sori and no indusia.
Syn. -- genus Cyclophorus. [ WordNet 1.5 ]

a. [ Gr. &unr_;&unr_;&unr_;&unr_;&unr_;, fr. &unr_;&unr_;&unr_;&unr_;. ] Pertaining to the Cyclops; Cyclopean. [ 1913 Webster ]

n. a colorless flammable gas (C3H6) with a three-carbon ring, sometimes used as an anesthetic. [ WordNet 1.5 ]