7-dehydrocholesterol

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Related to provitamin D3: provitamin D2

7-de·hy·dro·cho·les·ter·ol

(dē-hī'drō-kō-les'tĕr-ol),
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

7-dehydrocholesterol

/7-de·hy·dro·cho·les·ter·ol/ (de-hi″dro-kŏ-les´ter-ol) a sterol present in skin which, on ultraviolet irradiation, produces vitamin D.
activated 7-dehydrocholesterol  cholecalciferol.

7-dehydrocholesterol

(dē-hī″drō-kŏ-les′tĕ-rol″)
A steroid precursor of vitamin D that converts to the vitamin when skin is exposed to sunlight.