The Collaborative International Dictionary of English v.0.48:
Diaphoretic \Di`a*pho*ret"ic\, Diaphoretical \Di`a*pho*ret"ic*al\, a. [L. diaphoreticus, Gr. ?: cf. F. diaphor['e]tique. See Diaphoresis.] Having the power to increase perspiration. [1913 Webster]