'Substantiation' definitions:

Definition of 'substantiation'

(from WordNet)
noun
Additional proof that something that was believed (some fact or hypothesis or theory) is correct; "fossils provided further confirmation of the evolutionary theory" [syn: confirmation, verification, check, substantiation]
noun
The act of validating; finding or testing the truth of something [syn: validation, proof, substantiation]

Definition of 'Substantiation'

From: GCIDE
  • Substantiation \Sub*stan`ti*a"tion\, n. The act of substantiating or proving; evidence; proof. [1913 Webster]