单词 pre-opercular 释义 pre-opercular, pr-, a. (n.)|pripkjl(r)|[f. pre-opercul-um + -ar1.]Of or pertaining to the pre-operculum. Also absol. or as n. The pre-opercular bone, the pre-operculum.1854Owen Skel. & Teeth in Orr's Circ. Sc. I. Org. Nat. 178 The...