nucinn.
/ˈnjuːsɪn/, U.S. /ˈn(j)us(ə)n/ Chemistry. Now rare.
= juglone n.
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the world > matter > chemistry > organic chemistry > crystalline substances > [noun] > others
amygdalin1651
asparagine1813
ambrein1820
aloin1828
orcin1833
anemonin1838
guaranin1838
helenin1838
puteanic acid1838
styracin1838
alloxanic acid1839
roccelline1840
sinapisine1840
lilacine1842
syringin1843
orsellic acid1848
roccellinin1848
rhamnetin1858
sapogenin1862
frangulin1864
phycite1864
fisetin1865
nucin1866
phlorone1866
piperonal1869
apiol1872
stercorin1873
juglone1878
orcinol1880
kinoin1881
ursone1885
iridin1894
saponarin1902
sambunigrin1905
lepton1921
leuco-taxin1937
lotaustralin1938
ionophore1955
1866 H. Watts tr. L. Gmelin Hand-bk. Chem. XVII. 20 The nucin occurs ready formed, but is accompanied by another body, allied to pyrogallic acid, which readily decomposes the nucin when exposed to the air.
1878 Jrnl. Chem. Soc. 34 233 Juglone (Nucin)... This body, prepared from the green shells of walnuts (Juglans regia), has been analysed by the author, who assigns to it the empirical formula, C36H12O10.
1885 Cassell's Encycl. Dict. V. i Nucin, a yellow crystalline substance extracted from Green walnut-shells by means of ether. It is insoluble in water, sparingly soluble in alcohol, and sublimes at a little over 100° in reddish-yellow needles.
1947 Thorpe's Dict. Appl. Chem. (ed. 4) VIII. 621/1 Nucin, juglone, regianin, 5-hydroxy-1:4-naphthaquinone.., occurs in the shells of walnuts (Juglans regia) and is used as a hair dye.
1996 J. I. G. Cadogan et al. Dict. Org. Compounds (ed. 6) IV. 3750/2 5-Hydroxy-1,4-naphthalenedione, 9CI, Juglone, Nucin, Regianin.
This entry has been updated (OED Third Edition, December 2003; most recently modified version published online March 2022).
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n.1866