Entry 2 senses · 2 variants Webster, 1913 Iridic · I·rid·ic · IPA a. a. 01 a. Of or pertaining to the iris of the eye. 1. Of or pertaining to the iris of the eye. 02 a. Of or pertaining to iridium; -- said specifically of those compounds in which iridium has a relatively high valence. 1. Of or pertaining to iridium; -- said specifically of those compounds in which iridium has a relatively high valence.(Chem.)