| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024vitamin A, - 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.
vitamin A2, - a yellow oil, C20H28O, similar to vitamin A, obtained from fish liver.
Collins Concise English Dictionary © HarperCollins Publishers:: vitamin A n - a fat-soluble yellow unsaturated alcohol occurring in green and yellow vegetables (esp carrots), butter, egg yolk, and fish-liver oil (esp halibut oil). It is essential for the prevention of night blindness and the protection of epithelial tissue. Formula: C20H30O
Also called: vitamin A1, retinol
|