cycad

any tropical gymnosperm of the order Cycadales; having unbranched stems with a crown of fernlike leaves ;

cycad family

ancient palmlike plants closely related to ferns in that fertilization is by means of spermatozoids ;

cycadaceae

ancient palmlike plants closely related to ferns in that fertilization is by means of spermatozoids ;

cycadales

primitive tropical gymnosperms abundant in the Mesozoic, now reduced to a few scattered tropical forms ;

cycadofilicales

fossil gymnospermous trees or climbing plants from the Devonian: seed ferns ;

cycadophyta

palmlike gymnosperms: includes the surviving order Cycadales and several extinct orders; possibly not a natural group; in some systems considered a class (Cycadopsida) and in others a subdivision (Cycadophytina or Cycadophyta) ;

cycadophytina

palmlike gymnosperms: includes the surviving order Cycadales and several extinct orders; possibly not a natural group; in some systems considered a class (Cycadopsida) and in others a subdivision (Cycadophytina or Cycadophyta) ;

cycadopsida

palmlike gymnosperms: includes the surviving order Cycadales and several extinct orders; possibly not a natural group; in some systems considered a class (Cycadopsida) and in others a subdivision (Cycadophytina or Cycadophyta) ;

cycas

type genus of Cycadaceae: genus of widely distributed Old World evergreen tropical trees having pinnate leaves and columnar stems covered with persistent bases of old leaves ;

cycas circinalis

southeastern Indian cycad with palmlike foliage ;

cycas revoluta

dwarf palmlike cycad of Japan that yields sago ;

cyclades

the Bronze Age civilization on the Cyclades islands in the southern Aegean sea that flourished 3000-1100 BC ; a group of over 200 islands in the southern Aegean ;

cycladic civilisation

the Bronze Age civilization on the Cyclades islands in the southern Aegean sea that flourished 3000-1100 BC ;

cycladic civilization

the Bronze Age civilization on the Cyclades islands in the southern Aegean sea that flourished 3000-1100 BC ;

cycladic culture

the Bronze Age civilization on the Cyclades islands in the southern Aegean sea that flourished 3000-1100 BC ;

cyclamen

Mediterranean plant widely cultivated as a houseplant for its showy dark green leaves splotched with silver and nodding white or pink to reddish flowers with reflexed petals ;

cyclamen hederifolium

common wild European cyclamen with pink flowers ;

cyclamen neopolitanum

common wild European cyclamen with pink flowers ;

cyclamen purpurascens

Mediterranean plant widely cultivated as a houseplant for its showy dark green leaves splotched with silver and nodding white or pink to reddish flowers with reflexed petals ;

cycle

a wheeled vehicle that has two wheels and is moved by foot pedals ; a single complete execution of a periodically repeated phenomenon; "a year constitutes a cycle of the seasons" ; a periodically repeated sequence of events; "a cycle of reprisal and retaliation" ; a series of poems or songs on the same theme; "Schubert's song cycles" ; the unit of frequency; one hertz has a periodic interval of one second ; an interval during which a recurring sequence of events occurs; "the never-ending cycle of the seasons" ;

cycle of rebirth

(Hinduism) repeated rebirth in new forms ;

cycle per second

the unit of frequency; one hertz has a periodic interval of one second ;

cycle rickshaw

a tricycle (usually propelled by pedalling); used in the Orient for transporting passengers for hire; "boys who once pulled rickshaws now pedal pedicabs" ;

cycles/second

the unit of frequency; one hertz has a periodic interval of one second ;

cyclic disorder

a mild bipolar disorder that persists over a long time ;

cyclic neutropenia

neutropenia that occurs periodically ;

cyclic redundancy check

an error correction code that is recorded in each sector of a magnetic disk and used to catch errors in the data ;

cyclicity

the quality of recurring at regular intervals ;

cycling

the sport of traveling on a bicycle or motorcycle ;

cycliophora

tiny marine organisms each the size of a period found in great numbers on lobsters' lips; identified tentatively in 1995 as a new phylum or as possible link between Entoprocta and Ectoprocta ;

cyclist

a person who rides a bicycle ;

cyclobenzaprine

muscle relaxant (trade name Flexeril) used for muscle spasms or acute injury ;

cyclohexanol

a colorless oily alcohol that smells like camphor ;

cyclohexanol phthalate

the cyclohexanol ester of phthalic acid ;

cycloid

a line generated by a point on a circle rolling along a straight line ;

cycloloma

a caryophyllaceous genus of the family Chenopodiaceae ;

cycloloma atriplicifolium

bushy annual weed of central North America having greenish flowers and winged seeds ;

cyclone

a violent rotating windstorm ; (meteorology) rapid inward circulation of air masses about a low-pressure center; circling counterclockwise in the northern hemisphere and clockwise in the southern ;

cyclone cellar

an underground shelter where you can go until a storm passes ;

cyclooxygenase

either of two related enzymes that control the production of prostaglandins and are blocked by aspirin ;