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anguilliform

adjective
an·​guil·​li·​form | \aŋˈgwiləˌfȯrm\

Definition of anguilliform 

: having the form of an eel anguilliform fish species : characteristic of an eel anguilliform swimming

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First Known Use of anguilliform

1693, in the meaning defined above

History and Etymology for anguilliform

Latin anguilla eel + English -iform

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The first known use of anguilliform was in 1693

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