i.so.mer
n.（名词）Chemistry Any of two or more substances that are composed of the same elements in the same proportions but differ in properties because of differences in the arrangement of atoms.【化学】 同分异构体；同分异构物：两种或更多的由相同元素以相同比例组成的，但因原子的排列上的差异而在性质上相异的物质中的任何一种Physics Any of two or more nuclei with the same mass number and atomic number that have different radioactive properties and can exist in any of several energy states for a measurable period of time.【物理学】 同质异能素：两种或更多种具有相同的质子数和原子数，但有不同的辐射特性并能在几种能量状态中的任一种里存在一段可测量时间的原子核中
【引伸】
i.somer.ic
