Source : Webster's Revised Unabridged Dictionary (1913)

Assertory \As*sert"o*ry\, a. [L. assertorius, fr. asserere.]
   Affirming; maintaining.

         Arguments . . . assertory, not probatory. --Jer.
                                                  Taylor.

         An assertory, not a promissory, declaration. --Bentham.

         A proposition is assertory, when it enounces what is
         known as actual.                         --Sir W.
                                                  Hamilton.