equilateral arch

equilateral arch

[¦ē·kwə¦lad·ə·rəl ′ärch]
(architecture)
An arch described by two circular curves intersecting at the peak of the arch, each curve having a chord equal to the span.

equilateral arch, equilateral pointed arch, three-pointed arch

equilateral arch
A two-centered arch in which the chords of the curves just equal the span of the arch.