vitamin a1

from WordNet (r) 3.0 (2006)

vitamin A1
    n 1: an unsaturated alcohol that occurs in marine fish-liver
         oils and is synthesized biologically from carotene [syn:
         {vitamin A1}, {retinol}]

from The Collaborative International Dictionary of English v.0.48

Retinol \Ret"i*nol\, n. [Gr. ??? resin + L. oleum oil.]
   1. (Chem.) A hydrocarbon oil {C32H16}, obtained by the
      distillation of resin, -- used as a solvent, as an
      antiseptic, and in printer's ink.
      [1913 Webster +PJC]

   2. One of the compounds which function as vitamin A. Called
      also {vitamin A}, {vitamin A1} and {vitamin A alcohol}.
      See {vitamin A1}.
      [PJC]

from The Collaborative International Dictionary of English v.0.48

vitamin A1 \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.

   Syn: retinol.
        [WordNet 1.5 +PJC]

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