Dictionary

heterocercal

adjective het·ero·cer·cal \-ˈsər-kəl\

Definition of HETEROCERCAL

1
of a fish tail fin :  having the upper lobe larger than the lower with the vertebral column extending into the upper lobe
2
:  having or relating to a heterocercal tail fin
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First Known Use of HETEROCERCAL

1838

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