Noun Acephala Definition and Examples


Noun:

Acephala

Pronunciation:

/(ˌ)eɪˈkɛfələ//(ˌ)eɪˈsɛfələ//(ˌ)eɪˈsɛf(ə)lə/

Definition:
1.

noun

Treated as plural. A former class of invertebrates lacking distinct heads, broadly equivalent to Bivalvia (bivalve molluscs) but also including tunicates; (also in form acephala) invertebrates of this class collectively. Occasionally with singular concord (also in form acephala): an invertebrate of this class.
    ((n. pl.) 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:
    Early 19th century. From scientific Latin Acephala, plural noun, use as noun of post-classical Latin acephalus, after French acéphales, plural noun; compare scientific Latin -a.

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