| 单词 | gill book |
| 释义 | > as lemmasgill book gill book n. each of the respiratory organs of a horseshoe crab (order Xiphosura), comprising a large number of parallel leaves or folds of tissue carried on five pairs of flap-like appendages on the underside of the rear body segment (cf. book gill n. at book n. Compounds 3, lung book n. at lung n. Compounds 2). ΚΠ 1881 E. R. Lankester in Q. Jrnl. Microsc. Sci. 21 541 The lamellæ of the gill-books of Limulus are..delicate flattened bags with a setose free border. 1932 L. A. Borradaile & F. A. Potts Invertebrata xv. 445 The gill books are stated to be the most primitive respiratory organs. 2005 B. K. Hall Bones & Cartilage iv. 53/1 As with all invertebrate cartilages, gill book cartilages are unmineralized. < as lemmas |
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