| 释义 |
vitamin An.（名词）- A fat-soluble vitamin or a mixture of vitamins, especially vitamin A1 or a mixture of vitamins A 1 and A 2, occurring principally in fish-liver oils, milk, and some yellow and dark green vegetables, and functioning in normal cell growth and development. Its deficiency causes hardening and roughening of the skin, night blindness, and degeneration of mucous membranes. Also called retinol 维生素A：一种脂溶性维生素或维生素的混合物，尤指维生素A1或维生素A 1和A 2混合物，主要存在于鱼肝油、牛奶和一些黄色和深绿色的蔬菜中，其功能是促进细胞的正常生长和发育。缺乏此维生素将导致皮肤变粗变硬、夜盲及干眼病 也作 retinol
vitamin A1n.（名词）- A yellow crystalline compound, C20H 30O, extracted from egg yolks, milk, and cod-liver oil. 维生素A1：一种黄色晶状化合物，C20H 30O，取自于蛋黄、牛奶和鱼肝油中
vitamin A2n.（名词）- A golden yellow oil, C20H 28O, occurring chiefly in the livers of freshwater fish and having about 40 percent of the biological activity of vitamin A 1. 维生素A2：一种金黄色油，C20H 28O，主要存在于淡水鱼的肝脏中，有维生素A 1的百分之四十的生物活性
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