ORIFICIUM

(Lat.), n. n. Or-i2-fi2s(fi>k)'i2-uSm(u4m). See ORIFICE O. epiploicum. See FORAMEN of Monro. O. cutaneuni. The termination of any canal or cavity opening upon the cutaneous surface of the body. [L.] O. extermiin. The external opening of a canal or cavity. [L ] O. infuiidibuli. See HELICOTREMA. O. praeputii. The circular opening in the prepuce opposite the external orifice of the urethra. [L, 7 (a, 50).] O. urethra*. Ger., Harnrohrenmundung. The external opening of the urethra O. uteri. See Os uteri. O. uterinum. The uterine orifice of the oviduct. O. uterinum canal is cervicis. See Os uteri intern i in i. O. vagiiiale canal is cervicis. See Os uteri externum. O. ventriculi tertii anticum. See ITER ad infundibulum. O. ventriculi tertii post i cum. The entrance to the Sylvian aqueduct. [I, 3 (K).] [s. 172]