单词 | ostium |
释义 | os·ti·um (ŏstē-əm) n. pl. os·ti·a (-tē-ə) 1. A small opening or orifice, as in a body organ or passage. 2. Any of the small openings or pores in a sponge, through which water is drawn in. [Latin ōstium, door, opening, from ōs, mouth; see ōs- in the Appendix of Indo-European roots.] |
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