ˈsub-arch Archit.
[sub- 3, 5 b.]
A subsidiary or secondary arch; one of two or more arches grouped in a larger arch; the lowest member in an arch of two or more ‘orders’.
| 1835 R. Willis Archit. Mid. Ages vii. 91 The square body of the pier sustains the pier arches, while its lateral half shafts are appropriated to the sub-arches. 1849 Parker Introd. Gothic Archit. iii. 133 Three or more lancet-lights under one arch, the points of the sub-arches touching the enclosing arch. 1879 Cassell's Techn. Educ. III. 40 The first of the three orders, or ‘sub-arch’. |