Skip to main content
Select Source:

cycle

cy·cle / ˈsīkəl/ • n. 1. a series of events that are regularly repeated in the same order: the boom and slump periods of a trade cycle. ∎  the period of time taken to complete a single sequence of such events: the cells are shed over a cycle of twenty-eight days. ∎  technical a recurring series of successive operations or states, as in the working of an internal combustion engine, or in the alternation of an electric current or a wave. ∎  Biol. a recurring series of events or metabolic processes in the lifetime of a plant or animal: the storks' breeding cycle. ∎  Biochem. a series of successive metabolic reactions in which one of the products is regenerated and reused. ∎  Ecol. the movement of a simple substance through the soil, rocks, water, atmosphere, and living organisms of the earth. See carbon cycle, nitrogen cycle. ∎  Comput. a single set of hardware operations, esp. that by which memory is accessed and an item is transferred to or from it, to the point at which the memory may be accessed again. ∎  Physics a cycle per second; one hertz. 2. a complete set or series. ∎  a series of songs, stories, plays, or poems composed around a particular theme: Wagner's Ring Cycle. 3. a bicycle or tricycle. ∎  [in sing.] a ride on a bicycle. • v. [intr.] 1. ride a bicycle: she cycled to work every day. 2. move in or follow a regularly repeated sequence of events: economies cycle regularly between boom and slump.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"cycle." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"cycle." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/cycle-0

"cycle." The Oxford Pocket Dictionary of Current English. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/cycle-0

cycle

cycle, in astronomy, period of time required for the recurrence of some celestial event. The length of a cycle may be measured relative to the sun or to the fixed stars (see sidereal time). A frequently observed cycle is the day, during which the sun seems to circle around the earth due to the earth's rotation on its axis; although the length of the day varies, the average day is defined as exactly 24 hr of mean solar time. Another important cycle is the year, during which the earth completes an orbit of the sun. The solar year is measured from one vernal equinox to the next and is equal to 365 days, 5 hr, 48 min, 46 sec of mean solar time (see calendar). The sidereal year, measured relative to the stars, differs in length from the solar year due to the precession of the equinoxes. The moon goes through a cycle of phases as it orbits the earth, completing a cycle from one full moon to the next in about 291/2 days, or one lunar month (see synodic period). The moon completes an orbit of the earth relative to the stars in one sidereal month, which is about 2 days shorter than the lunar month. Every 18 years, 111/3 days the earth, moon, and sun are in very nearly the same relative positions; for this reason, solar and lunar eclipses recur in a cycle with this period. This cycle was known to the Chaldaeans (fl. 1000–540 BC) and was called the saros by them. Halley's comet reappears in a cycle whose period is about 75 years. Astronomers also make use of various other cycles, e.g., those of sunspots and variable stars.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"cycle." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"cycle." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/cycle

"cycle." The Columbia Encyclopedia, 6th ed.. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/cycle

cycle

cycle
1. (cycle time) An interval of time in which one set of events or phenomena is completed. It is usually the time required for one cycle of the memory system – the time between successive accesses – of a computer, and is sometimes considered to be a measure of computer power.

2. Any set of operations that is repeated regularly and in the same sequence. The operations may be subject to variations on each repetition.

3. (circuit) of a graph. A path that starts and ends at the same vertex. A cycle is said to be simple provided no edge appears more than once, and is elementary if no vertex (other than the start) appears more than once. See also Euler cycle, Hamiltonian cycle.

4. A permutation of a set that maps some subset T = {t1, t2, …, tm}

of S in such a way that each ti is mapped into ti+1 (i = 1, 2,…, m–1) and tm is mapped into t1; the remaining elements of S are left unaltered by the permutation. Two cycles (u1 u2 …) and (v1 v2 …)

are disjoint provided the sets {u1, u2, …} and {v1, v2, …}

are disjoint. Every permutation of a set can be expressed uniquely as the composition of disjoint cycles.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"cycle." A Dictionary of Computing. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"cycle." A Dictionary of Computing. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/cycle

"cycle." A Dictionary of Computing. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/cycle

cycle

cycle.
1. Name for series of items written to be perf. as a group and sometimes linked thematically either musically or by subject, esp. song-cycle (Ger. Liedercyclus). In opera the greatest cycle (4 operas) is Wagner's Der Ring des Nibelungen.

2. A complete vibration in mus. acoustics.

3. Any of systems of equal temperament in which tonal material is obtained by dividing octave into number of equal intervals.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"cycle." The Concise Oxford Dictionary of Music. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"cycle." The Concise Oxford Dictionary of Music. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/arts/dictionaries-thesauruses-pictures-and-press-releases/cycle

"cycle." The Concise Oxford Dictionary of Music. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/arts/dictionaries-thesauruses-pictures-and-press-releases/cycle

cycle

cycle In physics, series of changes through which any system passes which brings it back to its original state. For example, alternating current starts from zero voltage, rises to a maximum, declines through zero to a minimum and rises again to zero. In the internal combustion engine, the two-stroke engine completes one cycle each downward plunge and return; the four-stroke cycle takes two such movements.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"cycle." World Encyclopedia. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"cycle." World Encyclopedia. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/cycle

"cycle." World Encyclopedia. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/cycle

cycle

cycle recurrent period of years XIV (only occas. before XVII); recurrent succession of things XVII; series of poems, etc., relating to a central event or epoch XIX. — F. cycle or late L. cyclus — Gr. kúklos circle (see WHEEL).
So cyclic XVIII. — F. cyclique or L. cyclicus or Gr. kuklikós.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"cycle." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"cycle." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/cycle-1

"cycle." The Concise Oxford Dictionary of English Etymology. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/cycle-1

Cycle

Cycle

a set or series: a collection of miracle plays; a long indefinite period.

Examples: cycle of champions, 1829; of changes; of epics; of miracle plays; of morality, 1837; of poems; of metrical romances, 1837; of seasons; of songs; of sonnets, 1870; of years.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Cycle." Dictionary of Collective Nouns and Group Terms. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"Cycle." Dictionary of Collective Nouns and Group Terms. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/education/dictionaries-thesauruses-pictures-and-press-releases/cycle

"Cycle." Dictionary of Collective Nouns and Group Terms. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/education/dictionaries-thesauruses-pictures-and-press-releases/cycle

cycl-

cycl- (cyclo-) combining form denoting
1. cycle or cyclic.

2. the ciliary body.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"cycl-." A Dictionary of Nursing. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"cycl-." A Dictionary of Nursing. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/cycl

"cycl-." A Dictionary of Nursing. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/cycl

cycle

cyclecackle, crackle, grackle, hackle, jackal, mackle, shackle, tackle •ankle, rankle •Gaskell, mascle, paschal •tabernacle • ramshackle •débâcle, diarchal, matriarchal, monarchal, patriarchal, sparkle •rascal •deckle, freckle, heckle, Jekyll, shekel, speckle •faecal (US fecal), treacle •chicle, fickle, mickle, nickel, pickle, prickle, sickle, strickle, tickle, trickle •besprinkle, crinkle, sprinkle, tinkle, twinkle, winkle, wrinkle •fiscal •laical, Pharisaical •vehicle • stoical • cubicle • radical •medical, paramedical •Druidical, juridical, veridical •syndical •methodical, periodical, rhapsodical, synodical •Talmudical • graphical • pontifical •magical, tragical •strategical •alogical, illogical, logical •dramaturgical, liturgical, metallurgical, surgical •anarchical, hierarchical, monarchical, oligarchical •psychical •angelical, evangelical, helical •umbilical • biblical • encyclical •diabolical, follicle, hyperbolical, symbolical •dynamical, hydrodynamical •academical, agrochemical, alchemical, biochemical, chemical, petrochemical, photochemical, polemical •inimical • rhythmical • seismical •agronomical, anatomical, astronomical, comical, economical, gastronomical, physiognomical •botanical, Brahmanical, mechanical, puritanical, sanicle, tyrannical •ecumenical •geotechnical, pyrotechnical, technical •clinical, cynical, dominical, finical, Jacobinical, pinnacle, rabbinical •canonical, chronicle, conical, ironical •tunicle • pumpernickel • vernicle •apical • epical •atypical, prototypical, stereotypical, typical •misanthropical, semi-tropical, subtropical, topical, tropical •theatrical •chimerical, clerical, hemispherical, hysterical, numerical, spherical •calendrical •asymmetrical, diametrical, geometrical, metrical, symmetrical, trimetrical •electrical • ventricle •empirical, lyrical, miracle, panegyrical, satirical •cylindrical •ahistorical, allegorical, categorical, historical, metaphorical, oratorical, phantasmagorical, rhetorical •auricle • rubrical • curricle •classical, fascicle, neoclassical •farcical • vesicle •indexical, lexical •commonsensical, nonsensical •bicycle, icicle, tricycle •paradoxical • Popsicle • versicle •anagrammatical, apostatical, emblematical, enigmatical, fanatical, grammatical, mathematical, piratical, prelatical, problematical, sabbatical •impractical, practical, syntactical, tactical •canticle •ecclesiastical, fantastical •article, particle •alphabetical, arithmetical, heretical, hypothetical, metathetical, metical, parenthetical, poetical, prophetical, reticle, synthetical, theoretical •dialectical •conventicle, identical •sceptical (US skeptical) • testicle •analytical, apolitical, critical, cryptanalytical, diacritical, eremitical, geopolitical, hypercritical, hypocritical, political, socio-political, subcritical •deistical, egoistical, logistical, mystical, papistical •optical, synoptical •aeronautical, nautical, vortical •cuticle, pharmaceutical, therapeutical •vertical • ethical • mythical • clavicle •periwinkle • lackadaisical •metaphysical, physical, quizzical •whimsical • musical •Carmichael, cervical, cycle, Michael •unicycle • monocycle • motorcycle •cockle, grockle •corncockle • snorkel •bifocal, focal, local, univocal, varifocal, vocal, yokel •archducal, coucal, ducal, pentateuchal •buckle, chuckle, knuckle, muckle, ruckle, suckle, truckle •peduncle, uncle •parbuckle • carbuncle • turnbuckle •pinochle • furuncle • honeysuckle •demoniacal, maniacal, megalomaniacal, paradisiacal, zodiacal •manacle • barnacle • cenacle •binnacle • monocle • epochal •reciprocal •coracle, oracle •spectacle •pentacle, tentacle •receptacle • obstacle • equivocal •circle, encircle •semicircle

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"cycle." Oxford Dictionary of Rhymes. . Encyclopedia.com. 14 Dec. 2017 <http://www.encyclopedia.com>.

"cycle." Oxford Dictionary of Rhymes. . Encyclopedia.com. (December 14, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/cycle

"cycle." Oxford Dictionary of Rhymes. . Retrieved December 14, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/cycle