Definition of Acephala. Meaning of Acephala. Synonyms of Acephala
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Definition of Acephala
AcephalaLamellibranchia La*mel`li*bran"chi*a, Lamellibranchiata
La*mel`li*bran`chi*a"ta, n. pl. [NL. See lamella, and
Branchia, Branchiate.] (Zo["o]l.)
A class of Mollusca including all those that have bivalve
shells, as the clams, oysters, mussels, etc.
Note: 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 Acephala}. Called also
Conchifera, and Pelecypoda. See Bivalve. AcephalaAcephala A*ceph"a*la, n. pl. [NL., fr. Gr. ?, adj. neut. pl.,
headless. See Acephal.] (Zo["o]l.)
That division of the Mollusca which includes the bivalve
shells, like the clams and oysters; -- so called because they
have no evident head. Formerly the group included the
Tunicata, Brachiopoda, and sometimes the Bryozoa. See
Meaning of Acephala from wikipedia
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