corroborative

from WordNet (r) 3.0 (2006)

corroborative
    adj 1: serving to support or corroborate; "collateral evidence"
           [syn: {collateral}, {confirmative}, {confirming},
           {confirmatory}, {corroborative}, {corroboratory},
           {substantiating}, {substantiative}, {validating},
           {validatory}, {verificatory}, {verifying}]

from The Collaborative International Dictionary of English v.0.48

Corroborative \Cor*rob"o*ra*tive\ (k?r-r?b"?-r?-t?v), a. [Cf. F.
   corroboratif.]
   Tending to strengthen of confirm.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Corroborative \Cor*rob"o*ra*tive\, n.
   A medicine that strengthens; a corroborant. --Wiseman.
   [1913 Webster]

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