Anatinacea
plural noun
An·a·ti·na·cea
ˌanətəˈnāshēə
: a suborder of Eulamellibranchia of worldwide distribution comprising mollusks that have separate orifices for the ovaries and testes, a small foot, and the hinge of the shell without teeth
Word History
Etymology
New Latin, from Anatina, genus of mollusks (from Latin anat-, anas duck + New Latin -ina) + -acea
First Known Use
1872, in the meaning defined above