【医】 ostium primum
former; original
【化】 ortho-
【医】 arch-; arche-; ortho-; pro-; prot-; proto-
【医】 saeptum; septa; septation; septum alveoli
aperture; bore; foramen; hole; os; ostium; vulva
【化】 hole; opening
【医】 apertura; aperturae; aperture; bore; coel-; foramen; foramina; hiatus
mesh; opening; pore; Pori; porosity; porus; trema