Substruction
Pronunciation : Sub*struc"tion
Part of Speech : n.
Etymology : [L. substructio, fr. substruere, substructum, to build beneath; sub under + struere to build.] (Arch.)
Definition : Defn: Underbuilding; the foundation, or any preliminary structure intended to raise the lower floor or basement of a building above the natural level of the ground. It is a magnificent strong building, with a substruction very remarkable. Evelyn.
Source : Webster's Unabridged Dictionary, 1913