aldehydicadj.
/aldᵻˈhʌɪdɪk/, /aldᵻˈhɪdɪk/, U.S. /ˈˌældəˈhaɪdɪk/, /ˈˌældəˈhɪdɪk/ Chemistry.
Of, relating to, or characteristic of an aldehyde (in earliest use, spec. acetaldehyde (ethanal)).Earliest in † aldehydic acid n. Obsolete a supposed acid produced by reaction of acetaldehyde with silver oxide; cf. acetous acid n. at acetous adj. Compounds.
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1836 Rec. Gen. Sci. 3 40 From Liebig's experiments it appears that the formula of aldehydic acid is, C4H3O2, and, therefore, a true acetous acid; the composition of acetic acid being C4H3O3.
1846 Amer. Jrnl. Sci. 52 22 We apply a gentle lamp heat and continue the distillation as long as the aldehydic liquid passes over.
1860 J. J. Griffin Chem. Recreations (ed. 10) 447 Aldehydic acid has two replaceable atoms of hydrogen, and is therefore bibasic.
1882 Nature 16 Mar. 457 The formation of albumin by condensation of aldehydic groups with amido groups.
1913 T. H. Pope tr. E. Molinari Treat. Org. Chem. II. 433 With hydrogen the hexoses form hexitols, which are not aldehydic but only alcoholic in character.
1967 I. L. Finar Org. Chem. (ed. 5) I. viii. 174 The NMR spectrum of aldehydes is characteristic of these compounds in that the τ-value of an aldehydic proton is generally in the region of 0.1–0.7 p.p.m.
2008 Daily Mail (Nexis) 8 Dec. 46 Scents rich in aldehydic notes that have an effervescent quality make the wearer feel energised.
This entry has been updated (OED Third Edition, September 2012; most recently modified version published online December 2021).
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adj.1836