equilateral arch[¦ē·kwə¦lad·ə·rəl ′ärch]
An arch described by two circular curves intersecting at the peak of the arch, each curve having a chord equal to the span.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
equilateral arch, equilateral pointed arch, three-pointed arch
two-centered arch in which the chords of the curves just equal the span of the arch.A
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.