单词 | heterocercal |
释义 | het·er·o·cer·cal ![]() adj. 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. [HETERO- + Greek kerkos, tail + -AL1.] ![]() tail of a leopard shark Triakis semifasciata |
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