from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See vitamin D2.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Constituent of vitamin D2.
from the GNU version of the Collaborative International Dictionary of English
- n. one of the forms of vitamin d, a fat-soluble vitamin that prevents rickets. It is an unsaturated alcohol, C28H43OH found in foods such as milk and fish liver oils. It is used as a dietary supplement in milk.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a fat-soluble vitamin that prevents rickets
Exposure to UVB radiation from the sun causes a chemical reaction in skin cells that converts a form of cholesterol to a form of vitamin D called calciferol …
The vitamin was also called "calciferol," since it was found to boost calcium deposits in bone.
D (calciferol) helps teeth and bones stay healthy.