calcitriol
noun
cal·ci·tri·ol
| \ ˌkal-sə-ˈtrī-ˌȯl
, -ˌōl
\
, -ˌōl
\
Medical Definition of calcitriol
: a physiologically active metabolic derivative C27H44O3 of cholecalciferol that is synthesized in the liver and kidney and stimulates the intestinal absorption of calcium
— called also 1,25-dihydroxycholecalciferol