An electric arc.
Something that is shaped like a half circle or a crescent, such as the lunula of a fingernail.
A curved structure, as of masonry, that supports the weight of material over an open space, as in a bridge, doorway, etc.
A semicircular structure or arrangement.
Find another word for semicircle. In this page you can discover 8 synonyms, antonyms, idiomatic expressions, and related words for semicircle, like: half a circle, 180 degrees, arc, semicircumference, half-moon, arch, curve and hemicycle.