amphioxus
am·phi·ox·us
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
See Origin of AMPHIOXUS
New Latin, from amphi- + Greek oxys sharp
First Known Use: 1847
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