/ ˌaɪrɪˈdɒlədʒi; ˌɪrɪ-; NAmE ˌaɪrɪˈdɑːl-/ noun
[ U ] a form of alternative medicine in which the iris (= the coloured part of the eye) is examined in order to find out what is wrong with sb
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WORD ORIGIN
early 20th cent.: from Greek iris , irid- iris + -logy .