Webster's Revised Unabridged Dictionary · 1913

Diapnoic

Diapnoic , adjective

[Greek {not transcribed} outlet for the wind, exhalation, from {not transcribed} to blow through; dia` through + {not transcribed} to blow, breathe: compare French diapnoique.]

(Medicine) Slightly increasing an insensible perspiration; mildly diaphoretic.
(Medicine) A gentle diaphoretic.