When it is established the septum primum grows down and meets the endocardial cushions, and so the ostium primum is obliterated.
Here in the door-way, or ostium, we stop to note the "Salve!"
Double doors admitted the visitor to the entrance-hall, or ostium.
The porter, who sat in a niche of the entrance-corridor (ostium).
This will bring the anterior wall of the sinus with its ostium into view.
With the help of cocaine the ostium can then be enlarged with various instruments.
A probe is then passed into the ostium, and the anterior wall of the sinus is removed with a curette or rongeur forceps.
Aurelius had gone out into the ostium, which was still being shaken with the blows at the door.
When in consequence of the sealing of the ostium the tube becomes distended with serous fluid it is termed hydrosalpinx.
If this plan be not successful, the ostium sphenoidale can more certainly be discovered in the following way.
ostium os·ti·um (ŏs'tē-əm)
n. pl. os·ti·a (-tē-ə)
A small opening or orifice, as in a body organ.