mussel (plural mussels)
- Any of several groups of bivalve shellfish with elongated, asymmetrical shells
- fresh water mussels, usually edible, of the order Unionida in subclass Palaeoheterodonta.
- salt water mussels, usually edible, of the order Mytilida in subclass Pteriomorphia.
- Certain other bivalves of somewhat similar appearance, such as the zebra mussel and quagga mussel of the family Dreissenidae in subclass Heterodonta.
terms derived from mussel (noun)