n.
Pronunciation: ' se-m ē - ˌ s ə r-k ə l, ' se- ˌ m ī -, -mi-
Function: noun
Etymology: Latin semicirculus, from semi- + circulus circle
Date: 1526
1 : a half of a circle
2 : an object or arrangement of objects in the form of a half circle
– semi · cir · cu · lar \ ˌ se-m ē - ' s ə r-ky ə -l ə r \ adjective