vitamin A2

vi·ta·min A₂

(vī'tă-min)

Fat-soluble vitamin occurring chiefly in the livers of freshwater fish and having about 40% of the biologic activity of vitamin A₁.
See also: leukoplakia

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

vitamin A₂

A compound found in the livers of freshwater fish; similar in properties to vitamin A but with different ultraviolet absorption spectra.

Medical Dictionary, © 2009 Farlex and Partners

de·hy·dro·ret·i·nol

(dē-hīdrō-reti-nol)

Retinol with an additional double bond in the 3-4 position of the cyclohexane ring.
Synonym(s): vitamin A2.

Medical Dictionary for the Dental Professions © Farlex 2012