Synonyms for Semicircular:

adj.

crescent (adjective)
bowed, curved.

n.

domed, crosswise, elliptical, arched, circular, conical, hooked, cruciform, bowed, bent, round, cylindrical, corkscrew. semicircular (noun)
curved, curving.

Other synonyms:

Other relevant words:
domed, crosswise, elliptical, arched, circular, conical, hooked, cruciform, bowed, bent, round, cylindrical, corkscrew.

Usage examples for semicircular

  1. Three towers, one square, and the others semicircular remain, with the greater portion of the outer wall, enclosing several acres of green turf, over which, instead of mail- clad warriors, peaceable sheep now wander. – A Yacht Voyage Round England by W.H.G. Kingston
  2. The three had now turned to the left, and were travelling back again in a semicircular line toward the mountains, probably with the idea of working round to their old feeding grounds on the further side of the river. – Maiwa's Revenge The War of the Little Hand by H. Rider Haggard
  3. The city stretches along the coast on both sides her semicircular bay; but the terraced hills, the stretches of land beyond, and every peak and valley are thickly sown with human habitations. – Italy, the Magic Land by Lilian Whiting