25-hydroxycholecalciferol

[-hī-drŏk′sē-kō′lĭ-kăl-sĭfə-rôl′, -rōl′]
n.
  1. A metabolite of vitamin D3 that is produced primarily in the liver and is the circulating form of vitamin D in the body. It promotes intestinal absorption of calcium and is used in the treatment of rickets.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.