<zoology> 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 Mollusca.

Origin: NL, fr. Gr, adj. Neut. Pl, headless. See Acephal.

(01 Mar 1998)

acentric chromosome, acentric fragment, -aceous, acephal < Prev | Next > acephalan, acephali, acephalia

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