单词 rhopalium 释义 rhopalium Zool.|rpelm|Pl. -ia.[mod.L., f. Gr. ῥ club.]Each of a number of marginal sense-organs in some jellyfish. Hence rhopalial a.1888Rolleston & Jackson Forms Animal Life (ed. 2) 782 These tentacles shorten, and their basal porti...