orifice

noun

1. an opening or aperture, as of a tube or pipe; a mouthlike opening or hole; mouth; vent.

noun

1. mainly Technical an opening or mouth into a cavity; vent; aperture

n.early 15c., from Middle French orifice “the opening of a wound” (14c.) and directly from Latin orificium “an opening,” literally “mouth-making,” from os (genitive oris) “mouth” (see oral) + facere “make” (see factitious). Related: Orificial. n.

1. An opening, especially to a cavity or passage of the body; a mouth or vent.