The Collaborative International Dictionary
Diapnoic
Diapnoic \Di`ap*no"ic\, a. [Gr. ? outlet for the wind, exhalation, fr. ? to blow through; dia` through + ? to blow, breathe: cf. F. diapno["i]que.] (Med.) Slightly increasing an insensible perspiration; mildly diaphoretic. -- n. A gentle diaphoretic.
Wiktionary
diapnoic
a. (context medicine obsolete rare English) Slightly increasing perspiration; mildly diaphoretic.