单词 propterygium 释义 ‖ propterygium Ichthyol.|prptrdm|[mod.L., f. pro-2 + pterygium.]The anterior cartilaginous portion of the fin in elasmobranch fishes. Hence propterygial a., of or pertaining to the propterygium.1878Bell Gegenbaur's Comp. Anat. 478...