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ostiarius [ostiarius 词源字典]: "= ostiary", Old English; earliest use found in Wulfstan. From classical Latin ōstiārius (in post-classical Latin also hostiarius, from 800 in British sources) doorkeeper, in post-classical Latin also member of the lowest of the four lesser orders in the pre-Reformation Western Church from ōstium + -ārius.[ostiarius etymology, ostiarius origin, 英语词源]
ostiarius: "= ostiary", Old English; earliest use found in Wulfstan. From classical Latin ōstiārius (in post-classical Latin also hostiarius, from 800 in British sources) doorkeeper, in post-classical Latin also member of the lowest of the four lesser orders in the pre-Reformation Western Church from ōstium + -ārius.
ostracean: "Of or designating the former family Ostracea (now called Ostreidae) of bivalve molluscs, containing the oysters; relating to oysters", Mid 19th cent.; earliest use found in Todd's Cyclopaedia of Anatomy and Physiology. From scientific Latin Ostracea, former family name + -an.
osteoma: "A tumour of bone; specifically a well-circumscribed benign tumour composed of compact or trabecular bone, usually occurring in a bone of the skull", Mid 19th cent. From osteo- + -oma, after scientific Latin osteoma.
outmode: "To cause to be out of fashion, render obsolete or old-fashioned", Mid 17th cent.; earliest use found in Duchess of Newcastle (?1623–1673), writer. From out- + mode. With later use compare outmoded.
officina: "A workshop or place of production", Mid 19th cent.; earliest use found in Biblical Repertory. From classical Latin officīna workshop, studio, contraction of opificīna production, manufacture, in post-classical Latin also workshop from opifex + -īna. Compare French officine, Spanish oficina, Portuguese oficina.
oceanarium: "A large seawater aquarium in which marine animals are kept for study and public entertainment", 1940s: from ocean, on the pattern of aquarium.
optogram: "An image formed on the retina which, after death, has been rendered permanent by chemical fixatives", Late 19th cent.; earliest use found in Michael Foster (1836–1907), physiologist and politician. From opto- + -gram, after German Optogramm.
off-bearer: "A person who bears or carries off something; specifically a worker who moves newly moulded bricks away from a brickmaking machine or moulding table", Mid 19th cent. From off- + bearer. Compare off-bear.
odonto-: "Relating to a tooth or teeth", From Greek odous, odont- 'tooth'.
oersted: "A unit of magnetic field strength equivalent to 79.58 amperes per metre", Late 19th century: named after H. C. Oersted (see Oersted, Hans Christian).
ogive: "A pointed or Gothic arch", Late Middle English: from French, of unknown origin.
ooblast: "= oocyte", Late 19th cent.; earliest use found in American Naturalist. From German Ooblast from oo- + -blast.
omi (1): "In early imperial Japan: (a hereditary title for) the head of clan or family that claimed imperial ancestry, who usually also served as a high-ranking official in the Yamato court", Late 19th century; earliest use found in Transactions of the Asiatic Society of Japan. From Japanese omi clan chieftain (720 in Nihon-shoki, the Chronicles of Japan), fused compound of uncertain origin. Perhaps a contraction of ō-mi (from ō- great + -mi revered being, god (from (i)mi, nominalized stem of imu to shun)), but frequently apprehended as from ō- + mi body, person.
omi (2): "Originally among German communities: a grandmother", 1980s. From German Omi from Om- (in Oma) + -i, hypocoristic suffix.
OMI (3): "Oblate Fathers of Mary Immaculate", Early 20th century; earliest use found in The Catholic Encyclopaedia.
omphalectomy: "Excision of the umbilicus", Late 19th century; earliest use found in The New Sydenham Society's Lexicon of Medicine and the Allied Sciences.
ophite: "A green rock with spots or markings like a snake that can be either eruptive or metamorphic; serpentine", Mid 17th century: via Latin from Greek ophitēs 'serpentine stone', from ophis 'snake', + -ite¹.
odontic: "Of or relating to the teeth, or a tooth", Mid 17th century; earliest use found in Physical Dictionary. From Hellenistic Greek ὀδοντικός of or relating to the teeth, suitable for the teeth from ancient Greek ὀδόντ-, ὀδούς + -ικός.
oxyntic: "Of or denoting the secretory cells which produce hydrochloric acid in the main part of the stomach, or the glands which they compose", Late 19th century: from Greek oxunteos (verbal noun from oxunein 'sharpen') + -ic.