centurion (n.) Look up centurion at Dictionary.com
late 13c., from Latin centurionem (nominative centurio), "Roman army officer, head of a centuria" (a group of one hundred); see century.
century (n.) Look up century at Dictionary.com
1530s, "one hundred (of anything)," from Latin centuria "group of one hundred" of things of one kind (including a measure of land and a division of the Roman army, one-sixteenth of a legion, headed by a centurion), from centum "hundred" (see hundred) on analogy of decuria "a company of ten."

Used in Middle English from late 14c. as a division of land, from Roman use. The Modern English meaning is attested from 1650s, short for century of years (1620s). The older, general sense is preserved in the meaning "score of 100 points" in cricket and some other sports. Related: Centurial.
CEO (n.) Look up CEO at Dictionary.com
by 1984; abbreviation of chief executive officer.
cephalic (adj.) Look up cephalic at Dictionary.com
"pertaining to the head," early 15c., from Latin cephalicus, from Greek kephalikos "pertaining to the head," from kephale "head" (see cephalo-).
cephalization (n.) Look up cephalization at Dictionary.com
1864, coined by U.S. zoologist James D. Dana (1813-1895) from Greek kephale "head" (see cephalo-) on model of specialization, etc.
cephalo- Look up cephalo- at Dictionary.com
before vowels, cephal-, word-forming element meaning "head, skull, brain," Modern Latin combining form of Greek kephale "head, uppermost or top part, source," from PIE *ghebh-el- (source also of Tocharian spal "head;" Old High German gebal "skull;" also, via the notion of "front," Gothic gibla, Old Norse gafl "side of a facade").
cephalopod (n.) Look up cephalopod at Dictionary.com
1825, from French cephalopode, from Modern Latin Cephalopoda (the class name), from Greek kephale "head" (see cephalo-) + pod-, stem of pous "foot" (from PIE root *ped- "foot").
cephalothorax (n.) Look up cephalothorax at Dictionary.com
1829, from cephalo- "head" + thorax. Perhaps from French or German.
Cepheid (n.) Look up Cepheid at Dictionary.com
type of variable star, 1904, from Delta Cephi, the name of the first such star identified, which is in the dim northern constellation Cephus, named for Greek Kepheus, a mythical king. With -id.
ceraceous (adj.) Look up ceraceous at Dictionary.com
"waxy," 1738, from Latin cera "wax" (see cere (n.)) + -aceous.
ceramic (adj.) Look up ceramic at Dictionary.com
1850, keramic, from Greek keramikos, from keramos "potter's earth; tile; earthen vessel, jar, wine-jar, pottery," perhaps from a pre-Hellenic word. Watkins suggests possible connection with Latin cremare "to burn," but Klein's sources are firmly against this. Beekes says "No certain etymology," finds connection with kerasai "to mix" to be "formally unproblematic, but semantically not very convincing," and finds the proposed connection to verbs for "to burn, glow" "better from the semantic side," and concludes "this technical term for tile-making may well be Pre-Greek (or Anatolian)." Spelling influenced by French céramique (1806). Related: ceramist (1855). Ceramics is attested from 1857.
cerato- Look up cerato- at Dictionary.com
word-forming element meaning "horn," from Latinized form of Greek keras (genitive keratos) "horn of an animal; horn as a substance," from PIE *ker- (1) "horn, head" (see horn (n.)).
ceratosaurus (n.) Look up ceratosaurus at Dictionary.com
1884, from cerato- + -saurus.
Cerberus Look up Cerberus at Dictionary.com
"watch-dog guardian of Hades," late 14c., Latinized form of Greek Kerberos, which is of unknown origin, according to Klein perhaps cognate with Sanskrit karbarah, sabalah "spotted, speckled;" Sabalah was the name of one of the two dogs of Yama.
cere (n.) Look up cere at Dictionary.com
late 15c., from French cire "wax" (12c.), from Latin cera "wax, wax seal, wax writing tablet," related to Greek keros "beeswax," which is of unknown origin.
cereal (n.) Look up cereal at Dictionary.com
1832, "grass yielding edible grain," originally an adjective (1818) "having to do with edible grain," from French céréale (16c., "of Ceres;" 18c. in grain sense), from Latin Cerealis "of grain," originally "of Ceres," from Ceres, Italic goddess of agriculture, from PIE *ker-es-, from root *ker- (3) "to grow" (see crescent). The application to breakfast food cereal made from grain is American English, 1899.
cerebellum (n.) Look up cerebellum at Dictionary.com
1560s, from Latin cerebellum "a small brain," diminutive of cerebrum "the brain" (also "the understanding"), from PIE *keres-, from root *ker- (1) "horn; head."
cerebral (adj.) Look up cerebral at Dictionary.com
1816, "pertaining to the brain," from French cérébral (16c.), from Latin cerebrum "the brain" (also "the understanding"), from PIE *keres-, from root *ker- (1) "horn; head." Meaning "intellectual, clever" is from 1929. Cerebral palsy attested from 1824, originally a general term for cases of paralysis that seemed to be traceable to "a morbid state of the encephalon." Later used in a more specific sense from c. 1860, based on the work of English surgeon Dr. William Little.
cerebration (n.) Look up cerebration at Dictionary.com
1853, coined by English physiologist Dr. William B. Carpenter (1813-1885) from Latin cerebrum "brain" (see cerebral) + -ation. Related: Cerebrate (v.); cerebrated.
cerebrovascular (adj.) Look up cerebrovascular at Dictionary.com
1935, from cerebro-, comb. form of Latin cerebrum (see cerebral) + vascular.
cerebrum (n.) Look up cerebrum at Dictionary.com
1610s, from Latin cerebrum "the brain" (also "the understanding"), from PIE *keres-, from root *ker- (1) "horn; head."
ceremonial (adj.) Look up ceremonial at Dictionary.com
c. 1400, "belonging to (religious) ritual," also as a noun, "a ceremonial practice," from Late Latin caerimonialis "pertaining to ceremony," from caerimonia (see ceremony). Related: Ceremonially.
ceremonious (adj.) Look up ceremonious at Dictionary.com
1550s, from Middle French cérémonieux or directly from Late Latin caerimoniosus, from Latin caerimonia (see ceremony). Meaning "full of show and ceremony" is from 1610s. Related: Ceremoniously; ceremoniousness.
ceremony (n.) Look up ceremony at Dictionary.com
late 14c., cerymonye, from Old French ceremonie and directly from Medieval Latin ceremonia, from Latin caerimonia "holiness, sacredness; awe; reverent rite, sacred ceremony," an obscure word, possibly of Etruscan origin, or a reference to the ancient rites performed by the Etruscan pontiffs at Caere, near Rome. Introduced in English by Wyclif.
Ceres Look up Ceres at Dictionary.com
Roman goddess of agriculture (identified with Greek Demeter), also the name given to the first-found and largest asteroid (discovered 1801); see cereal. Her festival, Cerealia, was April 10.
Cereus (n.) Look up Cereus at Dictionary.com
cactus genus, 1730, from Latin cereus "waxen, waxy," from cera "wax" (see cere (n.)). So called from its shape, which suggests a candle.
ceriph (n.) Look up ceriph at Dictionary.com
"lines at the top or bottom of a letter;" see sans-serif.
cerise (n.) Look up cerise at Dictionary.com
shade of red, 1858, from French cerise, from rouge-cerise "cherry-red," from cerise "cherry" (see cherry).
cerium (n.) Look up cerium at Dictionary.com
element, first isolated in pure form in 1875, named for ceria, the name of the earth from which it was taken, which was discovered in 1803 and named by Berzelius and Hissinger for Ceres, the minor planet, which had been discovered in 1801 and named for the Roman goddess Ceres, from a root meaning "to grow." With metallic element ending -ium.
cero- Look up cero- at Dictionary.com
word-forming element meaning "waxy," from Latinized form of Greek keros "beeswax," a word of unknown origin. According to Beekes, in the absence of obvious ulterior connections, "As there is no evidence for Indo-European apiculture, we have to reckon with foreign origin for keros."
ceromancy (n.) Look up ceromancy at Dictionary.com
"divination by means of melted wax dripped in water" (the shapes supposedly previsioning a future spouse, etc.), 1650s, from French ceromancie, Medieval Latin ceromantia; see cere (n.) + -mancy.
cert Look up cert at Dictionary.com
colloquial abbreviation of certain or certainty, attested from 1889.
certain (adj.) Look up certain at Dictionary.com
c. 1300, "determined, fixed," from Old French certain "reliable, sure, assured" (12c.), from Vulgar Latin *certanus, from Latin certus "sure, fixed, settled, determined" (also source of Italian certo, Spanish cierto), originally a variant past participle of cernere "to distinguish, decide," literally "to sift, separate." This Latin verb comes from the PIE root *krei- "to sieve," thus "discriminate, distinguish," which is also the source of Greek krisis "turning point, judgment, result of a trial" (see crisis).

Of persons, "full of confidence in one's knowledge or judgment," from mid-14c. Euphemistic use (of a certain age, etc.) attested from mid-18c. Certainer, certainest were common to c. 1750, but have fallen from proper use for some reason. Expression for certain "assuredly" is attested by early 14c.
certainly (adv.) Look up certainly at Dictionary.com
c. 1300, in all main modern senses, from certain + -ly (2).
certainty (n.) Look up certainty at Dictionary.com
c. 1300, certeynte, "surety, pledge," from Anglo-French certeinté (late 13c.), Old French certainete "certainty," from Latin or Vulgar Latin *certanitatem (source of Old Spanish certanedad); see certain. Meaning "that which is certain" is attested from early 14c.; meaning "quality of being certain" is from mid-14c.
certes (adv.) Look up certes at Dictionary.com
mid-13c., from Old French certes, from Vulgar Latin certas, from Latin certe, adverb from certus "fixed, certain" (see certain).
certifiable (adj.) Look up certifiable at Dictionary.com
1846, from certify + -able. Meaning "so deranged as to be certifiably insane" is recorded from 1912.
certificate (n.) Look up certificate at Dictionary.com
early 15c., "action of certifying," from French certificat, from Medieval Latin certificatum "thing certified," noun use of neuter past participle of certificare (see certify). Of documents, from mid-15c., especially a document which attests to someone's authorization to practice or do something (1540s).
certificated (adj.) Look up certificated at Dictionary.com
1610s, past participle adjective from obsolete certificate (v.), from Medieval Latin certificatus, past participle of certificare (see certify).
certification (n.) Look up certification at Dictionary.com
early 15c., "notification;" mid-15c., "demonstration, proof," from Medieval Latin certificationem (nominative certificatio), noun of action from past participle stem of Late Latin certificare (see certify). Meaning "act of providing with a legal certificate" is from 1881.
certify (v.) Look up certify at Dictionary.com
mid-14c., "to declare the truth of," also "to vouch for or confirm" (an official record, etc.), from Old French certefiier "make certain, witness the truth of" (12c.), from Late Latin certificare "to certify, to make certain," from Latin certus "fixed, sure" (see certain) + root of facere "to make, do" (from PIE root *dhe- "to set, put"). Also used in Middle English in broader senses of "inform, give notice; instruct, to direct; to designate." Related: Certified; certifying. Certified public accountant attested from 1896.
certiorari Look up certiorari at Dictionary.com
legal Latin, "to be certified, to be informed or shown," from a word figuring in the opening phrase of such writs from superior to inferior courts seeking the records of a case. Passive present infinitive of certorare "to certify, inform," from certior, comp. of certus "sure" (see certain).
certitude (n.) Look up certitude at Dictionary.com
early 15c., from Middle French certitude "certainty" (16c.), from Late Latin certitudinem (nominative certitudo) "that which is certain," from Latin certus "sure, certain" (see certain).
cerulean (adj.) Look up cerulean at Dictionary.com
1660s, with -an + Latin caeruleus "blue, dark blue, blue-green," perhaps dissimilated from caelulum, diminutive of caelum "heaven, sky," which is of uncertain origin (see celestial). The Latin word was applied by Roman authors to the sky, the Mediterranean, and occasionally to leaves or fields. As a noun, from 1756.
cerumen (n.) Look up cerumen at Dictionary.com
"earwax," 1741, medical Latin cerumen, coined by Swiss anatomist Gaspard Bauhin (1560-1624) from Latin cera "wax" (see cere (n.)) on model of albumen; or else from Greek keroumenos "formed of wax."
cerveza (n.) Look up cerveza at Dictionary.com
Spanish for "beer," from Latin cervisia "beer" (related to Latin cerea "a Spanish beer"), from a Celtic *kerb- (compare Gaulish curmi, Old Irish cuirm, Middle Irish coirm, Welsh cwrwf, Old Cornish coref "beer"), from Proto-Celtic *kormi-, perhaps from PIE root *krem-, also source of Latin cremare "to burn" (see cremation). "Connection with ceres (as a drink from grain) is very dubious" [Tucker].
cervical (adj.) Look up cervical at Dictionary.com
1680s, "of the neck," from French cervical, from Latin cervix (see cervix). Meaning "of the neck of the womb" attested by 1860. Related: Cervically.
cervix (n.) Look up cervix at Dictionary.com
early 15c., "ligament in the neck," from Latin cervix "the neck, nape of the neck," from PIE *kerw-o-, from root *ker- (1) "horn; head." Applied to various neck-like structures of the body, especially that of the uterus (by 1702), where it is shortened from medical Latin cervix uteri (17c.). Sometimes in medical writing 18c.-19c. cervix of the uterus to distinguish it from the neck sense.
Cesar Look up Cesar at Dictionary.com
Spanish form of masc. proper name Caesar.
cesarean Look up cesarean at Dictionary.com
alternative spelling of caesarian (see also æ (1)).