GNU Collaborative International Dictionary of English

last match results

Found 5 definitions

1.       
   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]
   
   
         
       

2.       
   Retinol (?), 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]
   
   
         
       

3.       
   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]
   
   
         
       

4.       
   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]
   
   
         
       

5.       
   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]