heterocercal definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
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
Origin: ; from hetero- plush Classical Greek kerkos, a tail plush -al
heterocercal definition by American Heritage Dictionary
Relating to, having, or being a tail fin in which the upper lobe is larger than the lower and the vertebral column extends into the upper lobe, as in sharks.
Origin: hetero- + Greek kerkos, tail + -al1.
leopard shark's tail