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 of heterocercalfrom hetero- + Classical Greek kerkos, a tail + -al
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 of heterocercalhetero- Greek kerkos tail -al 1
tail of a leopard shark
(comparative more heterocercal, superlative most heterocercal)