英语词源字典 - 在线词源网站

oenanthic acid [oenanthic acid 词源字典]: "The straight-chain, saturated fatty acid n-heptanoic acid, CH3(CH2)5COOH; also called oenanthylic acid", Mid 19th cent.; earliest use found in Edinburgh New Philosophical Journal.[oenanthic acid etymology, oenanthic acid origin, 英语词源]
ocellated turkey: "A small wild turkey of Central America, Meleagris (or Agriocharis) ocellata, having prominent blue-centred eyespots on its tail", Mid 19th cent.; earliest use found in Edward Blyth (1810–1873), zoologist. After scientific Latin Meleagris ocellata.
otaku: "(In Japan) a young person who is obsessed with computers or particular aspects of popular culture to the detriment of their social skills", Japanese, literally 'your house', in formal speech also meaning 'you', used by some anime and manga fans as an affectedly formal way of addressing others with similar interests.
ovarium: " Anatomy and Zoology = ovary", Mid 17th cent.; earliest use found in Philosophical Transactions of the Royal Society of London. From post-classical Latin ovarium from classical Latin ōvum + -ārium. Compare post-classical Latin ovaria (feminine) the ovary of a bird, and classical Latin ōvārius (masculine) egg-keeper.
ophiological: "Of or relating to ophiology", Early 19th cent.; earliest use found in Noah Webster (1758–1843), lexicographer. From ophio- + -logical, after ophiology.
ophiolater: "A person who worships serpents", Late 19th cent.; earliest use found in Frederick Elworthy (1830–1907), philologist and antiquary. From ophio- + -later, after ophiolatry.
oleosity: " Figurative . Unctuousness, obsequiousness; = oiliness. rare", Early 17th cent.; earliest use found in Ben Jonson (?1573–1637), poet and playwright. From oleous + -ity: see -osity.
oenanthate: "A salt or ester of oenanthic acid", Mid 19th cent.; earliest use found in William Gregory (1803–1858), chemist and psychic investigator. From oenanth- + -ate.
oxychloride: "A compound containing both oxygen and chlorine; specifically (a) a combined oxide and chloride; (b) = chlorate", Mid 19th cent. From oxy- + chloride.
oleous: "Of the nature or consistency of oil; containing oil; oily", Early 17th cent.; earliest use found in Philemon Holland (1552–1637), translator. From classical Latin oleōsus oily from oleum oil + -ōsus. Compare French oléeux, Italian oleoso, Catalan oliós, Spanish oleoso, Portuguese oleoso.
ovicidal (1): "That kills sheep; of or relating to the killing of sheep", Mid 19th cent.; earliest use found in James Stephen. From ovi- + -cidal, after ovicide.
ovicidal (2): "Of, relating to, or effective in the killing or destroying of eggs or ova, especially those of insects, mites, or other pests or parasites", Mid 19th cent. From ovi- + -cidal. Compare later ovicide.
orofacial: "Relating to the mouth and face; located on or directed at the mouth and that part of the face adjacent to it", 1960s. From oro- + facial. Compare earlier orifacial.
orthopantomography: "A modification of pantomography in which the X-ray beam is kept perpendicular to the jaws, producing a flat image of both jaws and their teeth", 1950s. From ortho- + pantomography. Compare orthopantomogram, orthopantomograph.
occult blood: "Blood, especially in faeces or stomach contents, that is present in an amount too small to be visible, and that is detectable only by chemical or other laboratory tests", Early 20th cent.; earliest use found in Progressive Medicine.
octogenary: "The state or fact of being an octogenarian. rare", Late 17th cent.; earliest use found in John Aubrey (1626–1697), antiquary and biographer. From classical Latin octōgēnārius containing eighty, aged eighty, in post-classical Latin also used as noun denoting a person aged eighty from octōgēnī eighty each (from octōgintā eighty (from octo eight + -gintā, suffix forming cardinal numerals from thirty to ninety, related to decem ten: see decem-) + -ēnī, suffix forming distributive adjectives, after e.g. sēnī six apiece, six at a time, six) + -ārius. Compare Middle French, French octogénaire,, Italian ottogenario, †octuagenario, Spanish octogenario.
octode: "A thermionic valve with eight electrodes, used especially as a frequency changer in a superheterodyne receiver. Now rare", 1930s. From octo- + -ode. Compare earlier diode.
odd-and-end: "Consisting of odds and ends; miscellaneous", Mid 19th cent..
oniomania: "An obsessive or uncontrollable urge to buy things", From Greek ōnios 'for sale', from ōnos 'price, purchase': see -mania.
orthopantomogram: "A radiograph obtained by orthopantomography", 1950s. From ortho- + pantomogram. Compare orthopantomograph, orthopantomography.