activated 7-dehydrocholesterol

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a sterol found in the skin which, when properly irradiated by ultraviolet rays, forms vitamin D.
activated 7-dehydrocholesterol cholecalciferol.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.