Definitions for vitamin a1

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  1. vitamin A1, retinol(noun)

    an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene

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  1. vitamin A1(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.


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