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单词 vitamin a2
释义

WordReference Random House Unabridged Dictionary of American English © 2024
vitamin A, 
  1. Biochemistry, Nutritiona yellow, fat-soluble, solid terpene alcohol, C20H30O, obtained from carotene and occurring in green and yellow vegetables, egg yolk, etc.: essential to growth, the protection of epithelial tissue, and the prevention of night blindness. Also called vitamin A1, retinol. 
  • 1920–25

vitamin A2, 
  1. a yellow oil, C20H28O, similar to vitamin A, obtained from fish liver.

Collins Concise English Dictionary © HarperCollins Publishers::
vitamin A2 n
  1. a vitamin that occurs in the tissues of freshwater fish and has a function similar to that of vitamin A. Formula: C20H28O
    Also called: dehydroretinol
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