英 [ˈɒstiəm] 美 [ˈɑːstiəm]
n. [生物]口；门口；[生物]孔（等于 osculum）
复数ostia
ostium /ˈɒstɪəm/
名词 any of the pores in sponges through which water enters the body 海绵的孔
In anatomy, an ostium (plural ostia) is a small opening or orifice.
口，门，孔
入水眼
交配孔
孔（等于osculum）
心门
心门;交配孔;鳃小孔;入水眼
进水小孔
口
门
孔;心门;气门裂
... osteal骨的 ostium小孔 ostracodermi盔甲鱼纲 ...
... 心率 heart rate 心门 ostium 心囊 cardiacvesicle， cadiac sac， perica-rdial membrane ...
... 入水前庭区 prosochete 入水眼 ostium 软底质 softground ...
定义 中文名称： 气门裂 英文名称： ostium 定义： 位于蜱类气门板中间的半月形裂口。 应用学科： 昆虫学（一级学科）； 蜱螨学（二级学科） 以上内容由 全国科学技术名词审定委员会审定公布 相关
Is I does not want to open the ostium, aloofs.
是我不想打开心门，拒人于千里之外。
A certainty basic foundation for precision determine the cannon ostium velocity are offered.
从而为精确测定炮口速度提供了一定的理论基础。
Programmed stimulation was delivered at coronary sinus ostium, distal coronary sinus and lateral wall of left atrium.
分别通过冠状窦口电极、冠状窦远端电极和左房侧壁电极进行程控刺激。
Each is lined with tissue called the mucosa, which secretes mucus continuously along hairy cells called cilia and out a tiny passageway called an ostium, through which the mucus drains into the nasal cavity and down the back of the throat, where it is swallowed (unless you blow your nose).
They ended up producing a flexible catheter tube that goes a bit of the way up the nostrils, then a guide wire is inserted into the targeted sinus. (In live patients this is done via an endoscope and fluoroscope.) A balloon catheter is advanced over the guide wire and positioned against the blocked ostium.