os.ti.um
n.（名词）【复数】 os.ti.a[-tô-…] A small opening or orifice, as in a body organ or passage.小孔：小口或小洞，如在人体器官或人体内的通道上的Any of the small openings or pores in a sponge.孔隙：海绵上的小孔或小口
来源：Latin ôstium [door, opening] 拉丁语 ôstium [门，开口] from ôs [mouth] * see ôs- 源自 ôs [口] *参见 ôs-
