noun \ˌam(p)-fē-ˈäk-səs\
plural -oxi \-ˌsī\ or am·phi·ox·us·es

Definition of AMPHIOXUS

:  any of a genus (Branchiostoma) of lancelets; broadly :  lancelet


New Latin, from amphi- + Greek oxys sharp
First Known Use: 1847


noun \ˌam(p)-fē-ˈäk-səs\   (Medical Dictionary)
plural -oxi \-ˌsī, -ˌsē\ or am·phi·ox·us·es

Medical Definition of AMPHIOXUS

: a lancelet of the genus Branchiostoma; broadly : lancelet


noun    (Concise Encyclopedia)

Any of certain small marine chordates (invertebrate subphylum Cephalochordata) found widely on tropical and subtropical coasts and less commonly in temperate waters. Seldom more than 3 in. (8 cm) long, they resemble small, slender fishes without eyes or a definite head. They are grouped in several species in two genera (Branchiostoma or Amphioxus, and Epigonichthyes or Asymmetron). They spend much of their time buried in gravel or mud on the ocean bottom, though they are able to swim, and feed by filtering food particles from water passing through their gill slits. They have no brain or distinct heart.

Variants of AMPHIOXUS

amphioxus or lancelet


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