单词 ostium 释义 ‖ ostium|stm|Pl. ostia.[L. ostium door, entrance, mouth of a river.]†1. The mouth of a river. Obs.1665Sir T. Herbert Trav. (1677) 89 The great and noble River Ganges in two Ostiums falls under 23 deg.1695Woodward Nat. Hist. Earth i. 43...