(n) any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes, Syn.A, axerophthol, antiophthalmic factor
n. any of several related fat-soluble vitamins (such as retinol) essential for normal vision; it also prevents night blindness or inflammation or dryness of the eyes. Syn. -- antiophthalmic factor, axerophthol. [ WordNet 1.5 ]
n. retinol (C20H30O), one of the substances also called vitamin A. It is also called more specifically vitamin A alcohol. It is a required factor for human nutrition. The USP unit of activity is equal to 0.30 micrograms of retinol. Syn. -- retinol. [ WordNet 1.5 +PJC ]
n. dehydroretinol (C20H28O), one of the substances also called vitamin A. It has about 40% of the bioactivity of vitamin A1. Syn. -- dehydroretinol. [ WordNet 1.5 +PJC ]
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