Amphioxus
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A fishlike creature (Amphioxus lanceolatus), two or threeinches long, found in temperature seas; -- also called the lancelet.Its body is pointed at both ends. It is the lowest and mostgeneralized of the vertebrates, having neither brain, skull,vertebræ, nor red blood. It forms the type of the group Acrania,Leptocardia, etc.
Amphioxus meaning & definition 1 of Amphioxus.
