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单词 propterygium
释义 propterygium Ichthyol.|prɒptəˈrɪdʒɪəm|
[mod.L., f. pro-2 + pterygium.]
The anterior cartilaginous portion of the fin in elasmobranch fishes. Hence propteˈrygial a., of or pertaining to the propterygium.
1878Bell Gegenbaur's Comp. Anat. 478 The propterygium and the mesopterygium are evidently derived from rays which still remain attached to the shoulder-girdle.1889Nicholson & Lydekker Palæont. II. 920 In the pelvic fin of the Selachians the mesopterygium is absent, and the propterygium more or less rudimentary.1890Cent. Dict. s.v. Pterygium, Bearing..the propterygial, mesopterygial, and metapterygial basalia and radialia.
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更新时间:2024/11/5 18:48:59