Mytilidae

plural noun

My·​til·​i·​dae

mīˈtiləˌdē

: a family of marine bivalve mollusks (order Filibranchia) having the shell elongated and equivalve with a large narrow internal ligament and a byssus for attachment to the substrate compare mussel

Word History

Etymology

New Latin, from Mytilus, type genus + -idae

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