Source : Webster's Revised Unabridged Dictionary (1913)

Irriguous \Ir*rig"u*ous\, a. [L. irriguus. See {Irrigate}.]
   1. Watered; watery; moist; dewy. [Obs.]

            The flowery lap Of some irriguous valley spreads her
            store.                                --Milton.

   2. Gently penetrating or pervading. [Obs.] --J. Philips.