Entry 1 sense Webster, 1913 Iatrochemical · I·a·tro·chem·ic·al · IPA /aɪˌæt.ɹoʊˈkɛm.ɪ.kəl/ 01 a. Of or pertaining to iatrochemistry, or to the iatrochemists. 1. Of or pertaining to iatrochemistry, or to the iatrochemists.