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6 definitions found
 for vitamin A
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 A2 \vitamin A2\ 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]

From The Collaborative International Dictionary of English v.0.48 :

  vitamin A \vitamin A\ 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]

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 The Collaborative International Dictionary of English v.0.48 :

  axerophthol \axerophthol\ n.
     1. a vitamin essential for normal vision ({C20H30O); it
        prevents night blindness or inflammation or dryness of the
        eyes; same as vitamin A. One U.S.P. unit of vitamin A is
        equivalent to 0.30 micrograms of pure vitamin A alcohol.
  
     Syn: vitamin A; vitamin A alcohol; antiophthalmic factor;
          biosterol; retinol; A.
          [WordNet 1.5 +PJC]

From WordNet (r) 3.0 (2006) :

  vitamin A
      n 1: any of several fat-soluble vitamins essential for normal
           vision; prevents night blindness or inflammation or dryness
           of the eyes [syn: vitamin A, antiophthalmic factor,
           axerophthol, A]

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