| oil of lemon | Volatile oil expressed from fresh peel of Citrus limonum (family Rutaceae). Aromatic oil used for flavoring pharmaceuticals, liqueurs, pastry, foods, beverages, and in perfumes. (05 Mar 2000) |
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| oil of lemon grass | Volatile oil from Cymbopogon citratus and of C. Flexuosus (family Gramineae). Used in perfumery and as a source of citral for the synthesis of vitamin A. (05 Mar 2000) |
| oil of pennyroyal | Either American or European. The former is a volatile oil derived from the flowering tops and leaves of Hedeoma pulegioides (family Labiatae). Contains pulegone and ketones. European is oil of pulegium; a volatile oil from Mentha pulegium (family Labiatae); about 85% pulegone. Has been used as an aromatic carminative, abortifacient and insect repellent. (05 Mar 2000) |
| oil of peppermint | A volatile oil containing menthol (not less than 50% of total) obtained by steam distillation from the fresh flowering plant Mentha piperita (family Labiatae). Used as a pharmaceutical aid (flavor) and in flavoring liqueurs; a carminative. (05 Mar 2000) |
| oil of rose | A volatile oil from the fresh flowers of Rosa gallica and R. Damascena and other members of the Rosaceae family. Used largely in perfumery; ointments, and toilet preparations. Synonym: attar of rose, essence of rose, otto of rose. (05 Mar 2000) |
| oil of spearmint | Volatile oil from the flowering tops of Mentha spicata (family Labiatae, pharmaceutical aid (flavor) and a carminative. Synonym: oil of crispmint, oil of curled mint. (05 Mar 2000) |
| oil of turpentine | Volatile oil distilled from the oleoresin and obtained from Pinus palastrus (family Pinaceae) and other species of Pinus yielding terpene oils. Solvent for oils, resins, varnishes; vehicle, thinner and remover of oil-based paints. Rubefacient; has been used as a counterirritant in liniments. (05 Mar 2000) |
| oil of vitriol | H2SO4;a colourless, nearly odourless, heavy, oily, corrosive liquid containing 96% of the absolute acid; used occasionally as a caustic. Synonym: oil of vitriol. (05 Mar 2000) |
| oil of wormwood | Volatile oil from leaves and tops of Artemisia absinthium (family Compositae). Thujol alcohol and acetate; thujone (a powerful convulsant), phellandrene, cadinene; also a blue oil. Used in flavoring of vermouth; formerly in absinthe. (05 Mar 2000) |
| oil red O | 1-8-[4-(Dimethylphenylazo)dimethylphenylazo]-2-naphthalenol;a weakly acid diazo oil-soluble dye, used in histologic demonstration of neutral fats. (05 Mar 2000) |
| oil retention enema | A rectal injection of mineral oil, introduced at low pressure and retained for several hours before expelling, to soften faeces. (05 Mar 2000) |
| oil sugar | A class of preparations made by the trituration of a volatile oil (anise, fennel, lemon, etc.) with sugar; used as a diluent or corrigent of powerful or bad tasting drugs in powder form. Synonym: oil sugar. Origin: oleo-+ G. Saccharon, sugar (05 Mar 2000) |
| oil tumour | A nodule or focus of granulomatous inflammation (usually of the foreign-body type) in association with lipid material deposited in tissues, e.g., after the injection of certain oils. See: paraffinoma. Synonym: eleoma, oil tumour, oleogranuloma, oleoma. (05 Mar 2000) |
| oil vaccine | A vaccine that contains an adjuvant; most often the antigen (immunogen) is included in a water-in-oil emulsion (Freund incomplete type adjuvant), or is adsorbed onto an inorganic gel (alum, aluminum hydroxide or phosphate). (05 Mar 2000) |
| olive oil | The expressed oil of the fruit of Olea europaea; used as a cholagogue, laxative, and emollient, in the preparation of liniments, and in the preparation of foods. (05 Mar 2000) |