| gem | 1. <botany> A bud. 2. A precious stone of any kind, as the ruby, emerald, topaz, sapphire, beryl, spinel, etc, especially when cut and polished for ornament; a jewel. 3. Anything of small size, or expressed within brief limits, which is regarded as a gem on account of its beauty or value, as a small picture, a verse of poetry, a witty or wise saying. Artificial gem, an imitation of a gem, made of glass coloured with metallic oxide. 4. <prefix> Prefix denoting twin substitutions on a single atom; e.g., the gem-dimethyl substitution on carbon-4 of lanosterol. Origin: shortened form of L. Geminus, twin; OE. Gemme precious stone, F. Gemme, fr. L. Gemma a precious stone, bud. Source: Websters Dictionary (21 Jun 2000) |
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| Gemella | <bacteria> A genus of motile, aerobic, facultatively anaerobic, coccoid bacteria (family Streptococcaceae) which occur singly or in pairs, with flattened adjacent sides. They are Gram-indeterminate but have a cell wall like that of Gram-positive bacteria, and are parasitic on mammals. The type species is Gemella haemolysans, which is found in bronchial secretions and in mucus from the respiratory tract. Origin: L. Dim. Of geminus, twin (05 Mar 2000) |
| gemellipara | <obstetrics> An obsolete term for a woman who has given birth to twins. Origin: L. Gemellus, twin, + pario, to bear (05 Mar 2000) |
| gemellology | The study of twins and the phenomenology of twinning. Origin: L. Gemellus, twin-born, + G. Logos, study (05 Mar 2000) |
| gemellus | More specifically; inferior gemellus muscle, superior gemellus muscle. Origin: L. Dim. Of geminus, twin (05 Mar 2000) |
| gemfibrozil | <drug> That lowers plasma lipoprotein levels. (18 Nov 1997) |
| geminate | <botany> In pairs or twains; two together; binate; twin; as, geminate flowers. Origin: L. Geminatus, p.p. Of genimare to double. See Gemini. Source: Websters Dictionary (01 Mar 1998) |
| geminated teeth | <dentistry> A developmental anomaly arising from the attempted division of one tooth bud, resulting in incomplete formation of two teeth and usually manifest as a bifid crown upon a single root. (05 Mar 2000) |
| gemination | Embryologic partial division of a primordium. For example, gemination of a single tooth germ results in two partially or completely separated crowns on a single root. Origin: L. Geminatio, a doubling (05 Mar 2000) |
| gemini | <astronomy> A constellation of the zodiac, containing the two bright stars Castor and Pollux; also, the third sign of the zodiac, which the sun enters about May 20th. Origin: L, twins, pl. Of geminus; cf. Skr. Jmi related as brother or sister. Source: Websters Dictionary (01 Mar 1998) |
| geminiflorous | <botany> Having the flowers arranged in pairs. Origin: L. Geminus twin + flos, floris, flower. Source: Websters Dictionary (01 Mar 1998) |
| geminiviridae | <virology> A family of plant viruses where the virions possess an unusual morphology consisting of a pair of isometric particles. Transmission occurs via leafhoppers or whitefly and some viruses cause economically important diseases in cultivated plants. There are three genera: subgroup I geminivirus, subgroup II geminivirus, and subgroup III geminivirus. (12 Dec 1998) |
| geminous | <botany> In pairs or twains; two together; binate; twin; as, geminate flowers. Origin: L. Geminatus, p.p. Of genimare to double. See Gemini. Source: Websters Dictionary (01 Mar 1998) |
| gemistocyte | An alternative term for gemistocytic astrocyte. Origin: G. Gemistos, loaded, fr. Gemizo, to fill, + -cyte (05 Mar 2000) |
| gemistocytic astrocyte | <cell biology> A round to oval astrocyte cell with abundant cytoplasm containing glial filaments and an eccentric nucleus; may contain two nuclei in the cell hypertrophy of astrocytes. Synonym: gemistocyte, gemistocytic cell, reactive astrocyte, reactive cell. (05 Mar 2000) |