/kal si"tree awl', -ol'/ , n.
1. Biochem. a vitamin D compound, C 27 H 44 O 3 , occurring in humans as a hormone derived from cholesterol, that acts in the regulation and absorption of calcium.
2. Pharm. a preparation of this compound, used in the treatment of osteoporosis and bone fracture.
[ 1975-80; appar. CALCI(UM) + TRIOL ]