Meaning of dihydrotachysterol

di•hy•dro•ta•chys•ter•ol

Pronunciation: (dī-hī"drō-tu-kis'tu-rôl", -rol"), [key]
— n. Pharm.
  1. a white, crystalline, water-insoluble sterol, CHO, derived from ergosterol: used chiefly in the treatment of hypoparathyroidism.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.