— substructional , adj.
/sub struk"sheuhn/ , n.
a foundation or substructure.
[ 1615-25; substruction- (s. of substructio ) foundation, equiv. to substruct ( us ), ptp. of substruere to lay a foundation ( sub- SUB- + struc-, var. s. of struere to arrange, put in order + -tus ptp. suffix) + -ion- -ION ]