iridicadj.1
/ʌɪˈrɪdɪk/ Chemistry.
1. Containing iridium; applied to compounds in which iridium is quadrivalent, as IrCl4: cf. iridious adj.
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the world > matter > chemistry > elements and compounds > metals > specific elements > iridium > [adjective] > compounds
iridic1845
iridious1865
1845 E. A. Parnell Chem. Anal. 78 Iridic oxide.
1865–72 H. 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.
1865–72 H. Watts Dict. Chem. III. 322 The dioxide, or Iridic oxide, IrO2.
2. Denoting a crystalline acid, C9H11O3. COO2H, obtained by decomposition of iridin.
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1894 Jrnl. Chem. Soc. 66 i. 48 On heating irigenin with concentrated potash, in absence of air, formic acid, iridic acid, and iretol are obtained in molecular proportion.
This entry has not yet been fully updated (first published 1900; most recently modified version published online June 2018).
iridicadj.2
/ʌɪˈrɪdɪk/ Medicine.
Of or pertaining to the iris of the eye; = iridal adj. 2.
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the world > life > the body > sense organ > sight organ > parts of sight organ > [adjective] > iris
iridal1830
irian1842
irised1879
iridic1891
iridial1911
1891 M. Foster Text Bk. 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.
1930 Nature 19 July 97 Microscopic examination of the pupil tells us that the inner iridic margin..is really in a state of tremor of small amplitude.
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.
This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2018).
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adj.11845adj.21891