HETEROCERCAL

heterocercal

(adjective) possessing a tail with the upper lobe larger than the lower and with the vertebral column prolonged into the upper lobe

Source: WordNet® 3.1

Etymology

Adjective

heterocercal (comparative more heterocercal, superlative most heterocercal)

(ichthyology) 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.

Antonyms

• homocercal

Coordinate terms

• diphycercal

• homocercal

• protocercal

Source: Wiktionary

Het`er*o*cer"cal, a. Etym: [Hetero- + Gr. (Anat.)

Definition: Having the vertebral column evidently continued into the upper lobe of the tail, which is usually longer than the lower one, as in sharks.

Source: Webster’s Unabridged Dictionary 1913 Edition

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