| 单词 | pen-sac |
| 释义 | > as lemmaspen-sac ΚΠ 1874 E. R. Lankester in Q. Jrnl. Microsc. Sci. 14 371 Our attention is immediately directed to the pen-sac and pen of the Dibranchiata. 1884 Proc. 32nd Meeting Amer. Assoc. Advancem. Sci. 338 A flap or hood-like prolongation of the mantle, forming a pen-sac. < as lemmas |
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