Entry 2 senses · 2 variants Webster, 1913 Hidrotic · Hi·drot·ic · IPA a. n. 01 a. Causing perspiration; diaphoretic or sudorific. 1. Causing perspiration; diaphoretic or sudorific.(Med.) 02 n. A medicine that causes perspiration; a diaphoretic or a sudorific. 1. A medicine that causes perspiration; a diaphoretic or a sudorific.