| OAS | old age security; oral allergy syndrome; osmotically active substance |
|---|---|
| OAW | oral airways |
| OC | obstetrical conjugate; occlusocervical; office call; on call; only child; optic chiasma; oral contra... |
| OCA | oculocutaneous albinism; olivopontocerebellar atrophy; oral contraceptive agent |
| OCC | object-centered coordinate [method]; oral cholecystography |
| iodised oil | <chemical> Iodinated vegetable oil. The mixture contains 38-42% organically combined iodine that is used as a diagnostic aid (radiopaque medium). Pharmacological action: contrast media. Chemical name: Fats and Glyceridic oils, vegetable, iodinated (12 Dec 1998) |
|---|---|
| oil | A triglyceride that is liquid at room temperature. Compare: fat. (09 Oct 1997) |
| oil bath | In chemistry, a vessel containing oil, in which a container holding a substance to be heated or evaporated can be immersed. (05 Mar 2000) |
| oil cyst | A cyst resulting from loss of the epithelial lining of a sebaceous, dermoid, or lacteal cyst, or from the subcutaneous injection of oil or fat material. (05 Mar 2000) |
| oil embolism | <orthopaedics> The occurrence of fat globules in the bloodstream following fracture of a long bone, in burns, in childbirth or in association with fatty degeneration of the liver. Symptoms occur when fat globules block vessels within the lung (i.e. Pulmonary embolism) or the cerebral vasculature (i.e. Stroke). Fat embolism after bone fracture generally occurs in the first 3-4 days post fracture and commonly manifests with the signs and symptoms of pulmonary embolism. (27 Sep 1997) |
| oil glands | Numerous holocrine glands in the dermis that usually open into the hair follicles and secrete an oily semifluid sebum. Synonym: glandulae sebaceae, oil glands, sebaceous follicles. (05 Mar 2000) |
| oil of American wormseed | Volatile oil from the fresh above ground part of the flower, American wormseed, Chenopodium ambrosioides, or C. Anthelminticum. Used as an anthelmintic. Synonym: oil of American wormseed. (05 Mar 2000) |
| oil of anise | Volatile oil derived from the dried ripe fruit of Pimpinella anisum (family Umbelliferae) or of Illicium verum, (family Magnoliaceae) (Chinese star anise); has a characteristic anise aroma, resembling fennel. Used in manufacture of liqueurs, and as flavoring for candies, cookies, dentifrices. Pharmaceutical aid (flavor). Carminative. (05 Mar 2000) |
| oil of bay | Volatile oil derived by steam distillation of the dried leaves of Pimenta (Myrcia) acris (family Myrtaceae); oil of myrcia; used as an aromatic in the manufacture of bay rum and as a pharmaceutical aid. (05 Mar 2000) |
| oil of bergamot | Volatile oil derived by steam distillation from the rind of the fresh fruit of Citrus aurantium or C. Bergamia; contains l-linalyl acetate, l-linalool; d-limonene, dipentene, bergaptene; used as a deodorant in preparations containing malodorous ingredients and as an aromatic in perfumes, hairdressings, and pomades. (05 Mar 2000) |
| oil of bitter almond | Volatile oil from the dried ripe kernels of bitter almonds or from other kernels containing amygdalin, such as apricots, peaches, plums and cherries; obtained by steam distillation subsequent to maceration of the source with water. Formerly used as an antipruritic; poisonous-releases hydrocyanic acid (hydrogen cyanide). Only the oil free of hydrogen cyanide may be used to flavor liquors and foods. (05 Mar 2000) |
| oil of bitter orange | Volatile oil obtained by steam distillation from the fresh peel of Citrus aurantium (family Rutaceae). Aromatic material used as a flavoring agent in pharmaceuticals and foods and liquors; also used in perfumes. (05 Mar 2000) |
| oil of cardamom | Volatile oil obtained by steam distillation from the seeds of Elettaria cardamomum (family Zingiberacea.) A flavoring agent in pharmaceuticals (syrups), liquors, sauces, confections and baked goods; formerly used as a carminative. (05 Mar 2000) |
| oil of chenopodium | Volatile oil from the fresh above ground part of the flower, American wormseed, Chenopodium ambrosioides, or C. Anthelminticum. Used as an anthelmintic. Synonym: oil of American wormseed. (05 Mar 2000) |
| oil of cherry laurel | Volatile oil derived by steam distillation from Prunus laurocerasus (family Rosaceae); similar to oil of bitter almond; highly toxic due to hydrogen cyanide content. (05 Mar 2000) |