| heterocercal | <anatomy> Having the vertebral column evidently continued into the upper lobe of the tail, which is usually longer than the lower one, as in sharks. Origin: Hetero- + Gr. Tail. Source: Websters Dictionary (01 Mar 1998) |
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| heterocercal | (ichthyology) possessing a tail with the upper lobe larger than the lower and with the vertebral column prolonged into the upper lobe |
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| heterocercal | tail fin with unequal lobes in which the vertebral column turns upward into the larger lobe as in sharks |
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