Ob'tu-rā'tor, n.

n. [N. Lat., from obturare, to stop up; Fr. obturateur.] That which closes or stops up an entrance, cavity, or the like;—chiefly used in anatomy, usually prefixed adjectively to other words, to denote certain parts or organs, but often alone as a substantive to denote the same parts.

Obturator foramen (Anat.), an opening in the bony pelvis, between the pubic and ischiadic arches, closed by a membranous ligament.—Obturator muscles, two muscles which rise from the outer and inner side of the pelvis around the obturator foramen, and rotate the thigh outwardly.