orifice (n.) Look up orifice at Dictionary.com
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) + comb. form of facere "to make, do" (from PIE root *dhe- "to set, put"). Related: Orificial.