AMPHIOXI

AMPHIOXUS

lancelet, amphioxus

(noun) small translucent lancet-shaped burrowing marine animal; primitive forerunner of the vertebrates

Source: WordNet® 3.1

Noun

amphioxi

plural of amphioxus

Source: Wiktionary

AMPHIOXUS

Am`phi*ox"us, n. Etym: [NL., fr. Gr. (Zoöl.)

Definition: 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, vertebræ, nor red blood. It forms the type of the group Acrania, Leptocardia, etc.

Source: Webster’s Unabridged Dictionary 1913 Edition