柯林斯詞典carboxylate /kɑ??b?ks??le?t/ 1. N any salt or ester of a carboxylic acid having a formula of the type M(RCOO), where M is a metal and R an organic group, or R1COOR2, where R1 and R2 are organic groups 羧酸鹽 返回 carboxylate