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Yours, Etc.: Origins and Uses of 8 Sign-Offs

irone

[ahy-rohn, ahy-rohn] /aɪˈroʊn, ˈaɪ roʊn/
noun, Chemistry
1.
a colorless liquid of isomeric, unsaturated ketones, C 14 H 22 O, obtained from orris root: used in perfumery for its odor of violets.
Origin
1890-1895
1890-95; ir(is) + -one
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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