Source : Webster's Revised Unabridged Dictionary (1913)

Plausive \Plau"sive\, a. [L. plaudere, plausum, to applaud.]
   1. Applauding; manifesting praise. --Young.

   2. Plausible, specious. [Obs.] --Shak.

Source : WordNet®

plausive
     adj : expressing or manifesting praise or approval; "approbative
           criticism" [syn: {approving}, {approbative}, {approbatory}]