noun, plural amphioxi [am-fee-ok-sahy] , amphioxuses.
Zoology, lancelet.

1830–40; < Neo-Latin: literally, sharp at both ends < Greek amphi- amphi- + oxýs pointed Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
amphioxus (ˌæmfɪˈɒksəs)
n , pl -oxi, -oxuses
another name for the lancelet
[C19: from New Latin: both ends being sharp, from amphi- + Greek oxus sharp]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
amphioxus   (ām'fē-ŏk'səs)  Pronunciation Key 
See lancelet.
The American Heritage® Science Dictionary
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