| 单词 | ostium |
| 释义 | ostium /os"tee euhm/, n. , pl. ostia /-tee euh/. 1. Anat. , Zool. a small opening or orifice, as at the end of the oviduct. 2. Zool. one of the tiny holes in the body of a sponge. [1655-65; < L ostium entrance, river mouth] |
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