| gelatinous scleritis | A gelatinous-appearing swelling surrounding the cornea with a tendency to involve the periphery of the cornea. Synonym: gelatinous scleritis. (05 Mar 2000) |
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| gelatinous substance | The apical part of the posterior horn (dorsal horn; posterior gray column) of the spinal cord's gray matter, composed largely of very small nerve cells; its gelatinous appearance is due to its very low content of myelinated nerve fibres. Synonym: substantia gelatinosa, Rolando's gelatinous substance, Rolando's substance. (05 Mar 2000) |
| gelatinous tissue | A type of connective tissue little differentiated beyond the mesenchymal stage; its ground substance of glycoproteins is abundant and contains fine collagenous fibres and fibroblasts; in its most characteristic form, it appears in the umbilical cord as Wharton's jelly. Synonym: gelatinous tissue. (05 Mar 2000) |
| gelatinous varix | A lumpy or nodular condition of the umbilical cord. (05 Mar 2000) |
| gelation | <astronomy> The process of becoming solid by cooling; a cooling and solidifying. Origin: L. Gelatio a freezing, fr. Gelare to freeze. Source: Websters Dictionary (01 Mar 1998) |
| gelatum | Synonym: gel. Origin: Mod. L. (05 Mar 2000) |
| gelding | A castrated animal; usually applied to a horse, but formerly used also of the human male. "They went down both into the water, Philip and the gelding, and Philip baptized him." (Wyclif (Acts viii. 38)) Origin: Icel. Gelding a gelding, akin to geldingr wether, eunuch, Sw. Galling gelding, Dan. Gilding eunuch. See Geld. Source: Websters Dictionary (01 Mar 1998) |
| Gelineau | Jean Baptiste Edouard, French physician, 1859-1906. See: Gelineau's syndrome. (05 Mar 2000) |
| Gelineau's syndrome | <neurology> A disorder of sleep associated with excessive daytime sleepiness, involuntary daytime sleep episodes, disturbed nocturnal sleep and cataplexy. Narcolepsy affects over 100,000 people in the United States and appears to have a genetic basis. Symptoms usually begin in the patients twenties. Treatment often includes the use of amphetamines and-or tricyclic antidepressants. (27 Sep 1997) |
| Gell and Coombs Classification | A classification system that differentiates the 4 types of hypersensitivity reactions: Type I: anaphylactic reactions, Type II: cytotoxic reactions, Type III: immune complex reactions, and Type IV: cell-mediated reactions. (05 Mar 2000) |
| Gell, P | <person> British immunologist. See: Gell and Coombs reactions. (05 Mar 2000) |
| gellan lyase | <enzyme> Cleaves beta-d-glucosyl-1-4-beta-d-glucuronosyl sequence in gellan Registry number: EC 4.2.2.- Synonym: gellanase (26 Jun 1999) |
| Gelle test | A vibrating tuning fork is applied over the mastoid process; if it is heard, the air in the external auditory canal is compressed, by means of a rubber tube inserted into the canal and a hand bulb, thereby fixing the stapes in the oval window, and the sound ceases to be heard, but is again perceived if the air pressure is removed; a test of the mobility of the ossicles. (05 Mar 2000) |
| Gelle, Marie-Ernst | <person> French otologist, 1834-1923. See: Gelle test. (05 Mar 2000) |
| Gellerstedt, Nils | <person> *1896. See: Ceelen-Gellerstedt syndrome. (05 Mar 2000) |