英语词源字典 - 在线词源网站

Oedipus complex [Oedipus complex 词源字典]: "(In Freudian theory) the complex of emotions aroused in a young child, typically around the age of four, by an unconscious sexual desire for the parent of the opposite sex and wish to exclude the parent of the same sex. (The term was originally applied to boys, the equivalent in girls being called the Electra complex.)", Early 20th century: by association with Oedipus.[Oedipus complex etymology, Oedipus complex origin, 英语词源]
Oxon: "Oxfordshire", From medieval Latin Oxoniensis, from Oxonia (see Oxonian).
od: "A hypothetical power once thought to pervade nature and account for various scientific phenomena", Mid 19th century: arbitrary term coined in German by Baron von Reichenbach (1788–1869), German scientist.
octad: "A group or set of eight", Mid 19th century: via late Latin from Greek oktas, oktad-, from oktō 'eight'.
obvert: "Alter (a proposition) so as to infer another proposition with a contradictory predicate, e.g. ‘no men are immortal’ to ‘all men are mortal’", Early 17th century (in the sense 'turn something until it is facing'): from Latin obvertere, from ob- 'towards' + vertere 'to turn'.
old-maidy: "= old-maidish", Late 19th cent.; earliest use found in ‘Mark Twain’ (1835–1910), author and lecturer (real name Samuel Langhorne Clemens). From old maid + -y.
ozaena: " Medicine . Originally: an ulcer of the nose (or, rarely, other part of the body), especially when accompanied by a fetid discharge; any of various conditions characterized by the presence of such a lesion. Later: specifically a chronic disease of the nose characterized by atrophy of the nasal mucosa and bone, with a thick secretion that forms dry, extremely fetid crusts, often associated with the presence of bacteria of the genus Klebsiella", Late Middle English; earliest use found in Guy de Chauliac's Grande Chirurgie. From classical Latin ozaena (also ozēna) a fetid polypus in the nose, a strong-smelling marine polyp (Pliny) from Hellenistic Greek ὄζαινα from ancient Greek ὄζειν to smell + -αινα, suffix forming nouns.
oxygenate: "Supply, treat, charge, or enrich with oxygen", Late 18th century: from French oxygéner 'supply with oxygen' + -ate³.
ovocyte: "= oocyte", Late 19th cent.; earliest use found in Quarterly Journal of Microscopical Science. From German Ovocyte (T. Boveri 1892, in Anat. Hefte (Abt. II.) 1 446) from ovo- + -cyte.
orotic aciduria: "Excessive excretion of orotic acid in the urine; specifically a genetic (autosomal recessive) disorder of pyrimidine metabolism in humans, in which deficient activity of the enzyme uridine monophosphate synthase, which catalyses the two-step conversion of orotic acid to uridine monophosphate, results in the accumulation of orotic acid and in megaloblastic anaemia that responds to uridine administration", 1950s; earliest use found in Journal of Clinical Investigation. From orotic acid + -uria.
oreodont: "An extinct ruminant mammal of the family Oreodontidae, known from fossils of the Middle Tertiary period", Mid 19th cent. From scientific Latin Oreodont- (in Oreodontidae: J. Leidy 1869, in Jrnl. Acad. Nat. Sci. Philadelphia 7 71; from oreo- (in Oreodon) + -odont + -idae: see -id).
octachord: "A series of eight notes, as the ordinary diatonic scale", Mid 17th cent. As adjective from classical Latin octōchordos having eight strings or notes (Vitruvius) and its etymon ancient Greek ὀκτάχορδος having eight strings or notes from ὀκτα- + χορδή; compare French octacorde, octocorde. As noun from post-classical Latin octachordum, octochordum musical instrument with eight strings from Hellenistic Greek ὀκτάχορδον series of eight notes, use as noun of neuter singular of ancient Greek ὀκτάχορδος; compare French octacorde eight-stringed lyre, octocorde eight-stringed instrument, scale with eight notes.
occiput: "The back of the head", Late Middle English: from Latin occiput, from ob- 'against' + caput 'head'.
olivaster: "Olive-coloured; having an easily-tanned or Mediterranean skin", Early 17th cent.; earliest use found in Francis Bacon (1561–1626), lord chancellor, politician, and philosopher. From French †olivastre olive-coloured from Italian olivastro from oliva + -astro.
orchestic: "Of or relating to dancing; specifically of, belonging to, or designating a dance sequence performed by a chorus in classical theatre", Early 18th cent.; earliest use found in John Weaver (1673–1760), dancer and choreographer. From post-classical Latin orchesticus and its etymon ancient Greek ὀρχηστικός of or relating to dancing from ὀρχηστής dancer (from ὀρχεῖσθαι to dance + -της, suffix forming agent nouns) + -ικός.
Oreodon: "A former genus (now included in the genus Merycoidodon) of extinct pig-sized ruminant mammals of the family Oreodontidae, having four toes on each foot and selenodont teeth, the remains of which are found in Middle Tertiary rocks in the western United States; (also) an animal of this genus. Later chiefly in Oreodon beds: strata containing fossils of these animals", Mid 19th cent.; earliest use found in Proceedings of the Academy of Natural Sciences of Philadelphia. From scientific Latin Oreodon from Hellenistic Greek ὀρεο- + ancient Greek -όδον.
optant: "A person who chooses or has chosen", Early 20th century: via German and Danish from Latin optant- 'choosing', from the verb optare.
orchestics: "The art of dancing, especially as practised in ancient Greece", Mid 19th cent. From ancient Greek ὀρχηστικός orchestic: see -ic; originally after German Orchestik, noun.
ozokerite: "A brown or black paraffin wax occurring naturally in some shales and sandstones and formerly used in candles, polishes, and electrical insulation", Mid 19th century: from German Ozokerit, from Greek ozein 'to smell' + kēros 'wax'.
on-hook: "(Of a telephone) having the receiver resting on the hook; chiefly in on-hook dialling, a facility for initiating a telephone call without lifting the receiver", 1970s; earliest use found in The New York Times.