calcitriol
[ kal-si-tree-awl, -ol ]
/ kælˈsɪ triˌɔl, -ˌɒl /
noun
Biochemistry.
a vitamin D compound, C27H44O3, occurring in humans as a hormone derived from cholesterol, that acts in the regulation and absorption of calcium.
Pharmacology.
a preparation of this compound, used in the treatment of osteoporosis and bone fracture.