柯林斯詞典isomerism /a??s?m??r?z?m/ 1. N the existence of two or more compounds having the same molecular formula but a different arrangement of atoms within the molecule 同分異搆現(xiàn)象→see alsostereoisomerism ,optical isomerism 返回 isomerism劍橋詞典the existence of two or more chemical substances that are isomers 異搆現(xiàn)象 返回 isomerism