substruction

noun
sub·​struc·​tion | \ -kshən\
plural -s

Definition of substruction

: the underlying or supporting part of a fabrication (such as a building or dam)

Other Words from substruction

substructional \ -​kshənᵊl , -​shnəl \ adjective

History and Etymology for substruction

Latin substruction-, substructio, from substructus (past participle) + -ion-, -io -ion

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