amphioxea

noun
am·phi·ox·ea | \ ˌamfēˈäksēə , -ē(ˌ)äkˈsēə \
plural -s

Definition of amphioxea 

: a slightly curved needlelike sponge spicule

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First Known Use of amphioxea

1899, in the meaning defined above

History and Etymology for amphioxea

New Latin, from amphi- + oxea

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The first known use of amphioxea was in 1899

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