7-dehydrocholesterol

Medical Dictionary

7-dehydrocholesterol 7-de·hy·dro·cho·les·ter·ol (-dē-hī'drō-kə-lěs'tə-rôl', -rōl')
n.
A provitamin present in the skin of humans as well as the milk of mammals that becomes vitamin D3 when exposed to ultraviolet light.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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