orthographic (adj.)youdaoicibaDictYouDict[orthographic 词源字典]
1660s, from orthography + -ic. Related: Orthographically.[orthographic etymology, orthographic origin, 英语词源]
orthography (n.)youdaoicibaDictYouDict
"correct or proper spelling," mid-15c., ortographie, from Middle French orthographie (Old French ortografie, 13c.), from Latin orthographia, from Greek orthographia "correct writing," from orthos "correct" (see ortho-) + root of graphein "to write" (see -graphy). Related: Orthographer.
orthopaedics (n.)youdaoicibaDictYouDict
chiefly British English spelling of orthopedics; for spelling, see pedo-. Related: Orthopaedic.
orthopedic (adj.)youdaoicibaDictYouDict
1840, from French orthopédique, from orthopédie, coined by French physician Nicholas Andry (1658-1742), from Greek orthos "straight, correct" (see ortho-) + paideia "rearing of children," from pais (genitive paidos) "child" (see pedo-).
orthopedics (n.)youdaoicibaDictYouDict
1853, from orthopedic. Also see -ics.
orthopedist (n.)youdaoicibaDictYouDict
1853, from orthopedy (1840), from French orthopédie (18c.); see orthopedic + -ist.
orthopraxy (n.)youdaoicibaDictYouDict
1840, from ortho- + Greek praxis "a doing, action, performance" (see praxis).
Errata -- Page 263, line 9 from bottom, for 'orthodoxy' read orthopraxy. This is a new coin from the mint of Dr. [Andrew] Wylie [of Bloomington College, Indiana], at least I have not before noticed it. Its etymology places it in a just contrast with orthodoxy: for if that consecrated word indicates thinking right, orthopraxy will legitimately import doing right, and hence, as Mr. Wylie says, orthopraxy in the last dread day will pass the divine ordeal incomparably better than orthodoxy. O! that a zeal for orthopraxy would transcend the zeal for orthodoxy! ["The Millennial Harbinger," vol. IV, no. VIII, Bethany, Va., August 1840]
Orwellian (adj.)youdaoicibaDictYouDict
1950 (first attested in Mary McCarthy), from English author George Orwell (pseudonym of Eric Blair, 1903-1950), especially in reference to his novel "Nineteen Eighty-Four." Ironically, it has come to be used in reference to the totalitarian systems he satirized.
It is as if George Orwell had conceived the nightmare instead of analyzed it, helped to create it instead of helping to dispel its euphemistic thrall. [Clive James]
oryx (n.)youdaoicibaDictYouDict
late 14c., from Latin oryx, from Greek oryx (genitive orygos) "North African antelope with pointed horns, the digging animal," literally "pick-axe." Used in Greek and Latin bibles to render Hebrew tho, which early English Bibles misidentified as everything from a small hibernating animal to a wild bull.
os-youdaoicibaDictYouDict
frequent form of ob- before -c- and -t- in words from Latin.
OsageyoudaoicibaDictYouDict
name of a group of Siouxan Indians originally from Missouri, 1690s, via French, from their self-designation Wazhazhe. The ornamental tree osage orange (Toxylon pomiferum), name first attested 1817, originally was found in their country.
Oscan (adj.)youdaoicibaDictYouDict
of or pertaining to the ancient people of southern Italy, 1590s, from Latin Osci, Opsci (plural) "Oscans," literally "worshippers of Ops," a harvest goddess, the name related to Latin ops (genitive opis) "abundance, plenty, wealth, riches," from PIE *op- (1) "to work, produce in abundance" (see opus).
OscaryoudaoicibaDictYouDict
masc. proper name, Old English Osgar "god's spear," from gar "spear" (see gar) + os "god" (only in personal names); see Asgard.

The statuette awarded for excellence in film acting, directing, etc., given annually since, 1928, first so called 1936. The name is said to have sprung from a 1931 remark by Margaret Herrick, secretary at Academy of Motion Picture Arts and Sciences, on seeing the statuette: "He reminds me of my Uncle Oscar." Thus the award would be named for Oscar Pierce, U.S. wheat farmer and fruit grower.
oscillate (v.)youdaoicibaDictYouDict
1726, back-formation from oscillation, or else from Latin oscillatus, past participle of oscillare (see oscillation). From 1917 in electronics. Related: Oscillated; oscillating.
oscillation (n.)youdaoicibaDictYouDict
1650s, from French oscillation, from Latin oscillationem (nominative oscillatio), noun of action from past participle stem of oscillare "to swing," supposed to be from oscillum "little face," literally "little mouth," a mask of open-mouthed Bacchus hung up in vineyards as a charm (the sense evolution would be via the notion of "swing in the breeze"); from PIE *os- "mouth" (see oral).
oscillator (n.)youdaoicibaDictYouDict
agent noun in Latin form from oscillate; 1835 of persons, 1889 in reference to electric currents.
oscilloscope (n.)youdaoicibaDictYouDict
"instrument for visually recording an electrical wave," 1915, a hybrid formed from Latin oscillare "to swing" (see oscillation) + -scope.
oscitant (adj.)youdaoicibaDictYouDict
"yawning," from Latin oscitans "listless, sluggish, lazy," present participle of oscitare "to gape, yawn," from os citare "to move the mouth" (see oral and cite).
oscitation (n.)youdaoicibaDictYouDict
1540s, from Late Latin oscitationem (nominative oscitatio), noun of action from past participle stem of oscitare (see oscitant).
osculate (v.)youdaoicibaDictYouDict
"to kiss," 1650s, from Latin osculatus, past participle of osculari "to kiss," from osculum "a kiss; pretty mouth, sweet mouth," literally "little mouth," diminutive of os "mouth" (see oral). Related: Osculated; osculating.