▪ I. iridic, a.1 Chem.
(aɪˈrɪdɪk)
[f. irid-ium + -ic. Cf. F. iridique (Littré).]
Containing iridium; applied to compounds in which iridium is quadrivalent, as IrCl4: cf. iridious.
| 1845 Parnell Chem. Anal. 78 Iridic oxide. 1865–72 Watts Dict. Chem. III. 319 Iridic solutions..are of a dark brown-red colour; iridious solutions (containing the sesquioxide or trichloride)..have an olive-green colour. Ibid. 322 The dioxide, or Iridic oxide, IrO2. |
▪ II. iridic, a.2 Med.
(aɪˈrɪdɪk)
[f. as iridial a. + -ic.]
Of or pertaining to the iris of the eye; = iridal a. 2.
| 1891 M. Foster Textbk. Physiol. (ed. 5) IV. iii. 717 On the inside the curved circumferential portion of the cornea makes a blunt angle, ‘iridic angle’, with the outer edge of the more or less horizontal iris. 1907 Ophthalmoscope V. 378 A true fistulous passage lined by iridic pigmented epithelium. 1964 S. Duke-Elder Parsons' Dis. Eye (ed. 14) i. 6 The third portion of the muscle is composed of a few tenuous iridic fibres..finding insertion in the root of the iris. |