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Webster 1913 Edition
Lamellibranch
La-mel′li-branch
,Noun.
(Zool.)
One of the
Lamellibranchia
(also called Pelecypoda
). Also used adjectively. ☞ They usually have two (rarely but one) flat, lamelliform gills on each side of the body. They have an imperfectly developed head, concealed within the shell, whence they are called . Called also
Acephala
Conchifera
, and Pelecypoda
. See Bivalve
.