amphioxus

noun
am·​phi·​ox·​us | \ ˌam(p)-fē-ˈäk-səs How to pronounce amphioxus (audio) \
plural amphioxi\ -​ˌsī \ or amphioxuses

Definition of amphioxus

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

First Known Use of amphioxus

1837, in the meaning defined above

History and Etymology for amphioxus

New Latin, from amphi- + Greek oxys sharp

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The first known use of amphioxus was in 1837

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More Definitions for amphioxus

amphioxus

noun
am·​phi·​ox·​us | \ ˌam(p)-fē-ˈäk-səs How to pronounce amphioxus (audio) \
plural amphioxi\ -​ˌsī How to pronounce amphioxi (audio) , -​ˌsē How to pronounce amphioxi (audio) \ or amphioxuses

Medical Definition of amphioxus

 (Entry 1 of 2)

: a lancelet of the genus Branchiostoma broadly : lancelet

Amphioxus

noun

Medical Definition of Amphioxus (Entry 2 of 2)

taxonomic synonym of branchiostoma

More from Merriam-Webster on amphioxus

Britannica.com: Encyclopedia article about amphioxus

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