noun
PharmacologyA synthetic analogue of vitamin D₃, used in the treatment of conditions resulting from vitamin D deficiency.
Chemical name: 1α-hydroxycholecalciferol; C₂₇H₄₄O₂.
Origin
1970s; earliest use found in Approved Names 1977. From alfa, phonetic respelling of alpha + calci- + -idol, of uncertain origin; compare -ol.
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