ulmicadj.
/ˈʌlmɪk/ Chemistry.
ulmic acid:
a. = ulmin n. 1.A distinction between ulmic acid and ulmin or ulmine has been made by various chemists, but without agreement in the precise application of the terms.
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the world > matter > chemistry > organic chemistry > neutral substances from plants > [noun]
ulmic acid1831
pectin1833
peucedanin1836
imperatorin1838
humin1844
sycoretin1860
templin-oil1868
vanillin1868
phytosterin1881
carrageenin-
1831 T. Thomson Chem. Inorg. Bodies II. 105 Ulmic acid appears to be a vegetable substance of very great importance..obtained from the exudation of the elm by dissolving the exudation in water and precipitating the ulmic acid.
1836 W. T. Brande Man. Chem. (ed. 4) 923 As it [sc. ulmin] combines with bases, Boullay terms it ulmic acid... He represents ulmin, or ulmic acid, as a compound [etc.].
1868 H. Watts Dict. Chem. V. 936 The name ‘ulmic acid’, or ‘ulmin’, was given by Klaproth to a gummy substance contained in the black alkaline excrescences on the stems of unhealthy trees, especially of elms.
b. = ulmin n. 2.
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the world > matter > chemistry > organic chemistry > acids obtained from plants or trees > [noun] > ulmic acid
ulmin1817
ulmic acid1843
1843 Penny Cycl. XXV. 491/1 Ulmic acid plays an important part in manures and soils, and what is called moss~water owes its peculiar properties to its presence.
1868 H. Watts Dict. Chem. V. 936 The ammoniacal solution..deposits brown or black gelatinous flocks of ulmic acid.
This entry has not yet been fully updated (first published 1921; most recently modified version published online December 2019).
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adj.1831