Archit. [SUB- 2.] The construction of two or more subordinate arches under a main arch; the system of arches so constructed.
1845. J. Ingram, in Builder, III. 465/2. The principle of subarcuation; that is the mode of constructing two inferior and subordinate arches under the third or main arch.
a. 1878. Sir G. Scott, Lect. Archit. (1879), II. 112. The round pillar has lateral shafts to carry the sub-arcuation.
