单词：Unionidae
音标：['ju:niәnidi:] ；
珠蚌科
n freshwater mussels found worldwide
词型变化：名词复数形式 : unionidaes
Unionidae的用法和样例：
例句
- The parasitic larva of certain freshwater mussels of the family Unionidae,having hooks for attaching to the gills or other external parts of a host fish.瓣钩幼虫珠蚌科淡水贝类的寄生幼体，长有钩并用来附着在寄宿主鱼的鳃或其他体外部分。