| Ammon | Greek name of Egyptian god, Amun. See: Ammon's horn. (05 Mar 2000) |
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| Ammon's fissure | A pearl-shaped opening in the sclera during early embryogenesis. (05 Mar 2000) |
| Ammon's horn | One of the two interlocking gyri composing the hippocampus, the other being the dentate gyrus. Synonym: cornu ammonis. Origin: G. Ammon, the Egyptian deity Amun (05 Mar 2000) |
| Ammon's prominence | An external prominence in the posterior pole of the eyeball during early embryogenesis. (05 Mar 2000) |
| Ammon, Friedrich von | <person> German ophthalmologist and pathologist, 1799-1861. See: Ammon's fissure, Ammon's prominence. (05 Mar 2000) |
| ammonaemia | The presence of ammonia or some of its compounds in the blood, thought to be formed from the decomposition of urea; it usually results in subnormal temperature, weak pulse, gastroenteric symptoms, and coma. Synonym: hyperammonaemia. Origin: ammonia + G. Haima, blood (05 Mar 2000) |
| ammonia | <biochemistry> The common name for NH3, a strongly basic, irritating, colourlessgas which is lighter than air and readily soluble in water. It is formed in nature as a by-product of protein metabolism in animals.Industrially, it is used in explosives, fertiliser, refrigerants, household cleaningsolutions, etc. Ammonium hydroxide (NH4+), a solution of ammonia gas in water. (09 Oct 1997) |
| ammonia assimilation | The utilization of ammonia (or ammonium ions) in the net synthesis of nitrogen-containing molecules; e.g., glutamine synthetase. Synonym: ammonia fixation. (05 Mar 2000) |
| ammonia detoxication | The detoxication of ammonia and ammonium ion by the formation of ammonium salts, specific nitrogen-excretion products, or l-glutamine. (05 Mar 2000) |
| ammonia fixation | The utilization of ammonia (or ammonium ions) in the net synthesis of nitrogen-containing molecules; e.g., glutamine synthetase. Synonym: ammonia fixation. (05 Mar 2000) |
| ammonia monooxygenase | <enzyme> Ammonia is oxidised to hydroxylamine by nitrifying bacterium, nitrosomonas europaea; also hydroxylates alkanes and arenes; converts alkenes to epoxides Registry number: EC 1.7.3.- Synonym: ammonia mono-oxygenase (26 Jun 1999) |
| ammonia rash | Colloquially referred to as diaper, ammonia, or napkin rash; dermatitis of thighs and buttocks resulting from exposure to urine and faeces in infants' diapers. Formerly attributed to ammonia formation; moisture, bacterial growth, and alkalinity may all induce lesions. Synonym: ammonia rash, diaper rash, Jacquet's erythema, napkin rash. (05 Mar 2000) |
| ammonia-lyases | <enzyme> Enzymes that catalyze the formation of a c=c bond in a molecule by liberation of ammonia. Registry number: EC 4.3.1. (12 Dec 1998) |
| ammoniac | A gum resin from a plant of western Asia, Dorema ammoniacum (family Umbelliferae); used internally as a stimulant and expectorant, and externally as a counterirritant plaster. (05 Mar 2000) |
| ammoniacal | Relating to ammonia. (05 Mar 2000) |