tannicadj.

Brit.

/ˈtanɪk/, U.S.

/ˈtænɪk/

Etymology: < tann- (in tannin n.) + -ic suffix.

Chemistry.

tannic acid n. a name introduced in 1834 by Pelouze instead of tannin n., in recognition of its acid character and reactions; originally applied to the tannin principle obtained from oak-galls, a white amorphous strongly astringent substance, C₁₄H₁₀O₉, now more particularly distinguished from other forms of tannin as gallo-tannic acid at gallo-tannic adj. Now chiefly used in a general sense to include a great number of allied substances, which differ in the proportion of their elements. These are distinguished by compound names indicating their source, as quercitannic acid, that obtained from oak-bark, C₁₅H₁₂O₉; also caffetannic (C₁₅H₁₈O₈), catechutannic (C₁₇H₁₇O₉), cincho- or quinotannic (C₁₄H₁₆O₉), fraxitannic, kinotannic, ratanhiatannic acids, obtained from coffee, catechu, cinchona, ash-leaves, kino, and ratanhia respectively.

ΘΚΠ

the world > matter > chemistry > organic chemistry > acids obtained from plants or trees > [noun] > miscellaneous others

rheumic acid1816

arabic acida1836

rubiacic acid1835

aspartic acid1836

sylvic acid1836

tannic acid1836

oenanthic acid1837

gummic acid1838

retinic acid1838

roccellic acid1838

rubinic acid1838

lobelic acid1840

polychromatic acid1840

rhabarbaric acid1840

roccelline1840

humic1844

sumbulolic acid1844

isatic acid1845

opianic acid1845

parthenic acid1845

polychromic acid1847

styphnic acid1848

metapectic acid1849

tanningenic acid1852

jalapic acid1853

jalapinolic acid1855

sinapic acid1857

amalic acid1863

phycic acid1864

filicic acid1865

isamic acid1865

tannocaffeic acidc1865

tricarballylic acid1865

guaiaretic acid1866

pectous acid1866

phytomelin1866

porphyric acid1866

thujetic acid1868

turpetholic acid1868

viridic acid1868

rheotannic acid1869

arabinic acid1870

frangulic1872

sclerotic acid1876

theobromic acid1878

gynocardic acid1897

chaulmoogric acid1904

1834 Pelouze in Ann. de Chimie LIV. 337 (Feb. 17) La place du tannin, qu'il serait plus convenable d'appeler acide tannique, est marqué à côté de l'acide gallique lui-même.]

1836 W. T. Brande Man. Chem. (ed. 4) 925 A peculiar proximate principle, designated tannin... It has been obtained in a distinct form by Pelouze, and its characters are such that it may be appropriately termed tannic acid.

1855 A. B. Garrod Essentials Materia Medica 166 Cincho-tannic Acid..differs from ordinary tannin or tannic acid, in precipitating the persalts of iron green, and rapidly absorbing oxygen.

1866 H. E. Roscoe Lessons Elem. Chem. xxxviii. 332 Tannine, or Tannic Acid, C₂₇H₂₂O₁₇. This substance is contained widely diffused in certain parts of plants.

This entry has not yet been fully updated (first published 1910; most recently modified version published online March 2022).

单词	tannic
释义	tannicadj. Brit. /ˈtanɪk/, U.S. /ˈtænɪk/ Etymology: < tann- (in tannin n.) + -ic suffix. Chemistry. tannic acid n. a name introduced in 1834 by Pelouze instead of tannin n., in recognition of its acid character and reactions; originally applied to the tannin principle obtained from oak-galls, a white amorphous strongly astringent substance, C₁₄H₁₀O₉, now more particularly distinguished from other forms of tannin as gallo-tannic acid at gallo-tannic adj. Now chiefly used in a general sense to include a great number of allied substances, which differ in the proportion of their elements. These are distinguished by compound names indicating their source, as quercitannic acid, that obtained from oak-bark, C₁₅H₁₂O₉; also caffetannic (C₁₅H₁₈O₈), catechutannic (C₁₇H₁₇O₉), cincho- or quinotannic (C₁₄H₁₆O₉), fraxitannic, kinotannic, ratanhiatannic acids, obtained from coffee, catechu, cinchona, ash-leaves, kino, and ratanhia respectively. ΘΚΠ the world > matter > chemistry > organic chemistry > acids obtained from plants or trees > [noun] > miscellaneous others rheumic acid1816 arabic acida1836 rubiacic acid1835 aspartic acid1836 sylvic acid1836 tannic acid1836 oenanthic acid1837 gummic acid1838 retinic acid1838 roccellic acid1838 rubinic acid1838 lobelic acid1840 polychromatic acid1840 rhabarbaric acid1840 roccelline1840 humic1844 sumbulolic acid1844 isatic acid1845 opianic acid1845 parthenic acid1845 polychromic acid1847 styphnic acid1848 metapectic acid1849 tanningenic acid1852 jalapic acid1853 jalapinolic acid1855 sinapic acid1857 amalic acid1863 phycic acid1864 filicic acid1865 isamic acid1865 tannocaffeic acidc1865 tricarballylic acid1865 guaiaretic acid1866 pectous acid1866 phytomelin1866 porphyric acid1866 thujetic acid1868 turpetholic acid1868 viridic acid1868 rheotannic acid1869 arabinic acid1870 frangulic1872 sclerotic acid1876 theobromic acid1878 gynocardic acid1897 chaulmoogric acid1904 1834 Pelouze in Ann. de Chimie LIV. 337 (Feb. 17) La place du tannin, qu'il serait plus convenable d'appeler acide tannique, est marqué à côté de l'acide gallique lui-même.] 1836 W. T. Brande Man. Chem. (ed. 4) 925 A peculiar proximate principle, designated tannin... It has been obtained in a distinct form by Pelouze, and its characters are such that it may be appropriately termed tannic acid. 1855 A. B. Garrod Essentials Materia Medica 166 Cincho-tannic Acid..differs from ordinary tannin or tannic acid, in precipitating the persalts of iron green, and rapidly absorbing oxygen. 1866 H. E. Roscoe Lessons Elem. Chem. xxxviii. 332 Tannine, or Tannic Acid, C₂₇H₂₂O₁₇. This substance is contained widely diffused in certain parts of plants. This entry has not yet been fully updated (first published 1910; most recently modified version published online March 2022). < adj.1836
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