Definition of amphioxus in English:

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Pronunciation: /ˌamfēˈäksəs/


A lancelet that is caught for food in parts of Asia.
  • Genus Branchiostoma (formerly Amphioxus), family Branchiostomidae.
Example sentences
  • Thus amphioxus is the only chordate species in which distinct insulin and IGF genes have not been found.
  • Organisms along the lines of the cephalochordate amphioxus use the gill apparatus for filter feeding.
  • The cephalochordate amphioxus is the closest living invertebrate relative of the vertebrates and therefore the best model organism for understanding the composition of the ancestral chordate genome.


Mid 19th century: modern Latin, from amphi- + Greek oxus 'sharp'.

For editors and proofreaders

Syllabification: am·phi·ox·us

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