2 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Amphioxus \Am`phi*ox"us\, n. [NL., fr Gr ? + ? sharp.]
(Zo["o]l.)
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
From WordNet r 1.6 [wn]:
amphioxus
n : small translucent lancet-shaped burrowing marine animal;
primitive forerunner of the vertebrates [syn: {lancelet}]
more about amphioxus
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Lake Atitlan, Guatemala
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