柯林斯词典vitamin C 1. N →another name for ascorbic acid 返回 vitamin C剑桥词典a vitamin found in foods such as citrus fruit , green vegetables with a lot of leaves , tomatoes , and potatoes . It is important for healthy bones , joints , teeth , and gums (= the part of the mouth from which the teeth grow ), and for fighting infection . 維生素C 同義詞ascorbic acid 返回 vitamin C