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tail of a leopard shark
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.
(Zoology) ichthyol of or possessing a tail in which the vertebral column turns upwards and extends into the upper, usually larger, lobe, as in sharks. Compare homocercal
[C19: from hetero- + Greek kerkos tail]
het•er•o•cer•cal(ˌhɛt ər əˈsɜr kəl)
designating or having a tail fin in which the upper lobe is larger than the lower lobe, as in sharks.
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|Adj.||1.||heterocercal - possessing a tail with the upper lobe larger than the lower and with the vertebral column prolonged into the upper lobe|
ichthyology - the branch of zoology that studies fishes
homocercal - possessing a symmetrical tail that extends beyond the end of the vertebral column (as in most bony fishes)