either of the fins of a fish, situated one on each side of the lower surface of the body, that correspond to the hind limbs of a four-legged animal
| 单词 | pelvic fin |
| 释义 | pelvic finnouneither of the fins of a fish, situated one on each side of the lower surface of the body, that correspond to the hind limbs of a four-legged animal |
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