Heterocercal Definition
hĕtə-rō-sûrkəl
adjective
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.
Webster's New World
Antonyms:
Origin of Heterocercal
hetero– Greek kerkos tail –al
From American Heritage Dictionary of the English Language, 5th Edition
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