Source : Webster's Revised Unabridged Dictionary (1913)

Oppugnant \Op*pug"nant\, a. [L. oppugnans, p. pr. of oppugnare.
   See {Oppugn}.]
   Tending to awaken hostility; hostile; opposing; warring.
   ``Oppugnant forces.'' --I. Taylor. -- n. An opponent. [R.]
   --Coleridge.