7-dehydrocholesterol(redirected from provitamin D3)
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Related to provitamin D3: provitamin D2
A zoosterol in skin and other animal tissues that on activation by ultraviolet light becomes antirachitic and is then referred to as cholecalciferol (vitamin D3).
Synonym(s): provitamin D3
A steroid precursor of vitamin D that converts to the vitamin when skin is exposed to sunlight.