WordNet
semicircular arch
n. a round arch drawn from a single center [syn: Roman arch]
Usage examples of "semicircular arch".
There were horizontal, lozenge-shaped windows set at intervals around its walls, and the main entranceway was a semicircular arch shrouded with pendulous ivy.
The elevator entrance, a perfect semicircular arch, had been blasted out of asteroid material, as had all the tunnels, serviceways and bore holes of the Stone, by a fusion torch of extremely high power and efficiency.
There was a light immediately above the semicircular arch of this opening.
With plastic ties, he secured the three jump lines in a semicircular arch.