单词 physa 释义 ‖ physa Zool.|fas|[mod.L., a. Gr. ῦ bellows.]A small freshwater gastropod.1842Brande Dict. Sci. etc., Physa, a genus of freshwater snails; so called from the thinness and inflated appearance of the shell.1855Lyell Elem. Geol. xx, Freshw...