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单词 pelvic fin
释义

> as lemmas

pelvic fin
pelvic fin n. Zoology each of a pair of fins on the underside of a fish's body, attached to the pelvic girdle and helping to control direction.
ΚΠ
1882 Philos. Trans. (Royal Soc.) 173 372 No traces of the pelvic fins have yet become developed.
1939 Times 17 Mar. 23/6 The curious lobate shape of the second dorsal, the anal, and the pectoral and pelvic fins was notable, and was exactly of the Crossopterygian type.
2003 Pract. Fishkeeping Aug. 46/1 These [fish] have..an adhesive organ on the belly formed from their fused pelvic fins.
extracted from pelvicadj.
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