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The Collaborative International Dictionary of English v.0.48 (gcide)

Amphioxus \Am`phi*ox"us\, n. [NL., fr. Gr. 'amfi` ? sharp.]
(Zool.)
A fishlike creature ({Amphioxus lanceolatus}), two or three
inches long, found in temperature seas; -- also called the
{lancelet}. Its body is pointed at both ends. It is the
lowest and most generalized of the vertebrates, having
neither brain, skull, vertebr[ae], nor red blood. It forms
the type of the group {Acrania}, {Leptocardia}, etc.
[1913 Webster]

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