polymorphism
noun uk/ˌpɒl.iˈmɔː.fɪ.zəm/ us/ˌpɑː.liˈmɔːr.fɪ.zəm/
[ U ] science specialized多晶现象，多形态;多态性
the fact that something such as an animal or organism can exist in different forms
Compounds that exist in more than one crystalline form are said to exhibit polymorphism. 以一种以上的结晶形式存在的化合物展示了多晶现象。
[ C ] biology specialized遗传变异
a genetic variation
a polymorphism that may have protected ancestral populations from a form of malaria 一种可能曾保护祖先免受疟疾侵袭的遗传变异