methoxyln.
/mᵻˈθɒksɪl/, /mᵻˈθɒksʌɪl/, U.S. /məˈθɑks(ə)l/ Chemistry.
The organic radical CH3O—. Now usually attributive.
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1866 E. Frankland in Jrnl. Chem. Soc. 19 376 These compound radicals, especially the monads, are frequently linked to other elements by oxygen... In all such cases I propose to consider the radical and linking oxygen as a new compound radical. These radicals may be named hydroxyl, methoxyl, ethoxyl, &c.
1897 Science 23 July 143/2 The main reaction..consisted in the substitution of the methoxyl for the diazo group.
1913 Jrnl. Chem. Soc. 103 1736 The fact is further established by the persistence of the methoxyl group during subsequent reactions.
1925 Analyst 50 302 (heading) Micro-determination of methoxyl.
1934 C. C. Steele Introd. Plant Biochem. x. 101 Pectinic acids also occur intermediate in acidity and methoxyl content between pectic acid and pectin.
1964 N. G. Clark Mod. Org. Chem. viii. 144 The action of hydriodic acid on ethers also forms the basis of Zeisel's method for determining the number of methoxyl or ethoxyl groups in an organic compound.
1983 M. G. Lindley in T. H. Grenby et al. Devel. Sweeteners—2 viii. 243 It is necessary to modify the choice of pectin from one of relatively high methoxyl content to one of low methoxyl content.
This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).
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