1. marine bivalve mollusk having a dark elongated shell; live attached to solid objects especially in intertidal zones; [syn: marine mussel, mytilid]
WordNet (r) 3.0 (2006):
marine mussel
n 1: marine bivalve mollusk having a dark elongated shell; live
attached to solid objects especially in intertidal zones
[syn: marine mussel, mytilid]