mussel
/ˈmʌsəl/noun
1- any of a number of bivalve molluscs with a brown or purplish-black shell贻贝, 蚌类：
1.1
- a marine bivalve which uses byssus threads to anchor to a firm surface (family Mytilidae, order Mytiloidea), including the edible mussel (Mytilus edulis).贻贝,壳菜, 淡菜（贻贝科, 贻贝目）, 包括可食用贻贝（拉丁名Mytilus edulis）。
1.2
- a freshwater bivalve which typically lies on the bed of a river, some species forming small pearls (family Unionidae, order Unionoida).淡水蚌, 河蚌, 珠蚌（蚌科, 珠蚌目）。
词源
Old English mus(c)le, superseded by forms from Middle Low German mussel, Middle Dutch mosscele; ultimately from late Latin muscula, from Latin musculus （see MUSCLE）.