mus·sel / ˈməsəl/ •
n. any of a number of bivalve mollusks with a brown or purplish-black shell, in particular: ∎ a marine bivalve (family Mytilidae) that uses byssus threads to anchor to a firm surface, including the edible mussel (Mytilus edulis). ∎ a freshwater bivalve (family Unionidae) that typically lies on the bed of a river, some species forming small pearls.
Any of several species of bivalve molluscs
with thin, oval shells. Marine
species of the family Mytilidae are found throughout the world in colonies on sea walls and rocky shores, where they attach themselves by means of strands called byssus
threads. The edible mussel, Mytilus edulis, is sometimes cultivated on ropes hanging from rafts. Freshwater
mussels of the family Unionidae, found in n
continents only, produce pearls