Webster's Revised Unabridged Dictionary · 1913

Irriguous

Irriguous , adjective

[Latin irriguus. See Irrigate.]

1.
Watered; watery; moist; dewy. [Obsolete]
The flowery lap Of some irriguous valley spreads her store. — Milton
2.
Gently penetrating or pervading. [Obsolete] — J. Philips