| oleandrine | <chemistry> One of several alkaloids found in the leaves of the oleander. Source: Websters Dictionary (01 Mar 1998) |
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| oleanolic acid | <chemical> 3 beta-hydroxyolean-12-en-28-oic acid. Occurs in leaves of olea europaea, viscum album l., and other higher plants. It is also the aglycone component of many saponins. Chemical name: Olean-12-en-28-oic acid, 3-hydroxy-, (3beta)- (12 Dec 1998) |
| oleaster | <botany> The wild olive tree (Olea Europea, var. Sylvestris). Any species of the genus Elaeagus. See Eleagnus. The small silvery berries of the common species (Elaeagnus hortensis) are called Trebizond dates, and are made into cakes by the Arabs. Origin: L, fr. Olea olive tree. See Olive, Oil. Source: Websters Dictionary (01 Mar 1998) |
| oleate | <chemistry> A salt of oleic acid. Some oleates, as the oleate of mercury, are used in medicine by way of inunction. Origin: Cf.F. Oleate. Source: Websters Dictionary (01 Mar 1998) |
| olecranal | <anatomy> Of or pertaining to the olecranon. Source: Websters Dictionary (01 Mar 1998) |
| olecranon | <anatomy> The large process at the proximal end of the ulna which projects behind the articulation with the humerus and forms the bony prominence of the elbow. Origin: NL, fr.Gr.; elbow + the head. Source: Websters Dictionary (01 Mar 1998) |
| olecranon bursitis | Inflammation of the olecranon bursa. (05 Mar 2000) |
| olecranon fossa | A hollow on the dorsum of the distal end of the humerus, just above the trochlea, in which the olecranon process of the ulna rests when the elbow is extended. Synonym: fossa olecrani, anconal fossa. (05 Mar 2000) |
| olecranon process | <anatomy> The large process at the proximal end of the ulna which projects behind the articulation with the humerus and forms the bony prominence of the elbow. Origin: NL, fr.Gr.; elbow + the head. Source: Websters Dictionary (01 Mar 1998) |
| olecranon reflex | Flexion of the forearm caused by tapping the olecranon. Synonym: paradoxical triceps reflex. (05 Mar 2000) |
| olefiant | <chemistry> Forming or producing an oil; specifically, designating a colourless gaseous hydrocarbon called ethylene. Origin: F. Olefiant, fr.L. Oleum oil + -ficare (in comp). Cf. -Fy. Source: Websters Dictionary (01 Mar 1998) |
| olefin | <chemistry> An organic molecule containing carbon and hydrogen atoms in straight or branched chains, where at least one carbon-carbon bond is a double bond. One of three major classes of aliphatic hydrocarbons. (13 Nov 1997) |
| olefine | <chemistry> Olefiant gas, or ethylene; hence, by extension, any one of the series of unsaturated hydrocarbons of which ethylene is a type. See Ethylene. Origin: From Olefiant. Source: Websters Dictionary (01 Mar 1998) |
| oleic | <physiology> Pertaining to, derived from, or contained in, oil; as, oleic acid, an acid of the acrylic acid series found combined with glyceryl in the form of olein in certain animal and vegetable fats and oils, such as sperm oil, olive oil, etc. at low temperatures the acid is crystalline, but melts to an oily liquid above 14 C. Origin: L. Oleum oil: cf. F. Oleique. Source: Websters Dictionary (01 Mar 1998) |
| oleic acid | Organic, monobasic acids derived from hydrocarbons by the equivalent of oxidation of a methyl group to an alcohol, aldehyde, and then acid. Fatty acids are saturated and unsaturated (fatty acids, unsaturated). (12 Dec 1998) |