heterocercal Hear it!

heterocercal definition

hetero·cer·cal (het′ər ō′sʉr′kəl)

adjective

designating, of, or having a tail fin in which the upper lobe is larger than the lower and contains the upturned end of the spinal column, as in certain fishes, esp. sharks

Etymology: < hetero- + Gr kerkos, a tail + -al

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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