柯林斯詞典vitamin A 1. N a vitamin that occurs in the tissues of freshwater fish and has a function similar to that of vitamin A. Formula: C20H28O 維生素A2 (Also called dehydroretinol) 返回 vitamin A劍橋詞典a vitamin found in foods such as butter , egg yolk , milk , and fish oils , or produced in the body from the carotene in green vegetables with a lot of leaves or in orange vegetables . It is important for normal growth , healthy skin , and the ability to see well, especially at night . 維生素A 同義詞retinol 返回 vitamin A