| natraemia | Natriaemia The presence of sodium in the blood. Origin: natrium, sodium, + G. Haima, blood (05 Mar 2000) |
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| natrexone hydrochloride | 17-(Cyclopropylmethyl)4,5a-epoxy-3,14-dihydroxymorphinan-6-one hydrochloride;an orally active narcotic antagonist used in maintenance therapy of detoxified, formerly opioid-dependent, patients. (05 Mar 2000) |
| natriferic | Tending to increase sodium transport. Origin: natrium + L. Fero, to carry (05 Mar 2000) |
| natrium | <chemistry> The technical name for sodium. Origin: NL. See Natron. Source: Websters Dictionary (01 Mar 1998) |
| natriuresis | <physiology> The excretion of abnormal amounts of sodium in the urine. Origin: L. Natrium = sodium, Gr. Ouresis = a making water (18 Nov 1997) |
| natriuretic | <endocrinology> Of a substance or hormone, causing natriuresis (elimination of extra sodium in the urine). See: atrial natriuretic peptide. (18 Nov 1997) |
| natriuretic hormone | <chemical> A low-molecular weight substance, possibly from the hypothalamus, which is released due to plasma volume expansion. It causes natriuresis in part by inhibiting sodium potassium atpase. The development of hypertension may be the consequence of an abnormality in volume regulation induced by a defect in the renal response to the natriuretic effect of the natriuretic hormone. Do not confuse with atrial natriuretic factor or cardionatrin which is a different, well characterised hormone. Chemical name: Natriuretic factor (12 Dec 1998) |
| natrolite | <chemical> A zeolite occuring in groups of glassy acicular crystals, and in masses which often have a radiated structure. It is a hydrous silicate of alumina and soda. Origin: Natron: cf. F. Natrolithe. Source: Websters Dictionary (01 Mar 1998) |
| natron | <chemical> Native sodium carbonate. Alternative forms: anatron. Origin: F, fr. Sp. Natron, Ar. Natrun, nitrun. Cf. Niter, Anatron. Source: Websters Dictionary (01 Mar 1998) |
| natronobacterium | A genus of rod-shaped, extremely halophilic halobacteriaceae which grows in alkaline conditions. They are strictly aerobic and some strains are motile. Natronobacterium is found in soda lakes, alkaline salterns, and soda soils. (12 Dec 1998) |
| natronococcus | A genus of coccoid, extremely halophilic halobacteriaceae which grows in alkaline conditions. They are nonmotile and strictly aerobic and are found in soda lakes, alkaline salterns, and soda soils. (12 Dec 1998) |