Calcitriol Definition
kăl′sĭ-trī ′ ôl′, -ōl′
noun
The active metabolite of vitamin D, C27 H44 O3 , that is synthesized in the kidneys and liver from vitamin D2 or vitamin D3 and acts as a calcium-regulating hormone. A synthetic form is used as a drug to treat hypocalcemia, bone disease caused by renal failure, and, in topical preparations, psoriasis.
American Heritage Medicine
(biochemistry) The active metabolite 1,25-dihydroxycholecalciferol of vitamin D3 that is involved in the absorption of calcium.
Wiktionary
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