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3 definitions found
 for vitamin A1
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]

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]

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