(1) - Semicentennial (n.) A fiftieth anniversary. (2) - Semicentennial (a.) Of or pertaining to half of a century, or a period of fifty years; as, a semicentennial commemoration.
(1) - Semicircle (n.) An instrument for measuring angles. (2) - Semicircle (n.) A body in the form of half of a circle, or half of a circumference. (3) - Semicircle (n.) A semicircumference. (4) - Semicircle (n.) The half of a circle; the part of a circle bounded by its diameter and half of its circumference.
