Heterocercal

adj

Definitions

Adjective
  1. 1
    Of a fish's tail, such that the vertebral column bends and extends upwards into the upper lobe of the tail, making it larger than the lower lobe; as in sharks, rays, and skates.
Adjective
  1. 1
    possessing a tail with the upper lobe larger than the lower and with the vertebral column prolonged into the upper lobe wordnet

Etymology

From hetero- + cercal.

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