pectousadj.

Brit.

/ˈpɛktəs/, U.S.

/ˈpɛktəs/

Origin: A borrowing from Greek, combined with an English element. Etymons: Greek πηκτός , -ous suffix.

Etymology: < ancient Greek πηκτός congealed (see pectic adj.) + -ous suffix. Compare French pecteux (1868 in Littré). Compare earlier pectic adj., pectinous adj.

Chemistry and Biochemistry. Now rare.

1. Congealed; turned into a gel.

ΘΚΠ

the world > matter > chemistry > physical chemistry > phases > [adjective] > phase transitions

uncondensable1846

pectous1861

1861 T. Graham in Philos. Trans. (Royal Soc.) 151 184 Fluid colloids appear to have always a pectous modification.

1875 B. W. Richardson Dis. Mod. Life 104 In course of time..the vital tissues become thickened, or, to use the technical term, ‘pectous’.

1913 A. B. Reeve Dream Doctor xxii. 339 The blood and other muscular and nervous fluids of the body had remained in an aqueous condition instead of becoming pectous.

1935 Trans. Faraday Soc. 31 921 Graham used the word ‘pectous’..for sols which have turned to a jelly. We therefore propose to call a thixotropic sol, which may be solidified by gentle movement, ‘rheopectic’.

2. = pectic adj. 2a.

ΘΚΠ

the world > matter > chemistry > organic chemistry > acids obtained from plants or trees > [adjective] > from fruits and berries

pectic1851

pectin1864

pectous1866

1866–77 H. Watts Dict. Chem. IV. 364 Pectase immersed in water for two or three days, is decomposed..and is then no longer capable of acting as a pectous ferment.

1916 E. H. S. Bailey Source, Chem. & Use Food Products 246 Some varieties [of plum] contain a large quantity of pectous substances.

Compounds

† pectous acid n. Obsolete = pectic acid n. at pectic adj. 1.

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

1866–77 H. Watts Dict. Chem. IV. 364 The conversion of the pectin into pectosic and pectous acids.

This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).

单词	pectous
释义	pectousadj. Brit. /ˈpɛktəs/, U.S. /ˈpɛktəs/ Origin: A borrowing from Greek, combined with an English element. Etymons: Greek πηκτός , -ous suffix. Etymology: < ancient Greek πηκτός congealed (see pectic adj.) + -ous suffix. Compare French pecteux (1868 in Littré). Compare earlier pectic adj., pectinous adj. Chemistry and Biochemistry. Now rare. 1. Congealed; turned into a gel. ΘΚΠ the world > matter > chemistry > physical chemistry > phases > [adjective] > phase transitions uncondensable1846 pectous1861 1861 T. Graham in Philos. Trans. (Royal Soc.) 151 184 Fluid colloids appear to have always a pectous modification. 1875 B. W. Richardson Dis. Mod. Life 104 In course of time..the vital tissues become thickened, or, to use the technical term, ‘pectous’. 1913 A. B. Reeve Dream Doctor xxii. 339 The blood and other muscular and nervous fluids of the body had remained in an aqueous condition instead of becoming pectous. 1935 Trans. Faraday Soc. 31 921 Graham used the word ‘pectous’..for sols which have turned to a jelly. We therefore propose to call a thixotropic sol, which may be solidified by gentle movement, ‘rheopectic’. 2. = pectic adj. 2a. ΘΚΠ the world > matter > chemistry > organic chemistry > acids obtained from plants or trees > [adjective] > from fruits and berries pectic1851 pectin1864 pectous1866 1866–77 H. Watts Dict. Chem. IV. 364 Pectase immersed in water for two or three days, is decomposed..and is then no longer capable of acting as a pectous ferment. 1916 E. H. S. Bailey Source, Chem. & Use Food Products 246 Some varieties [of plum] contain a large quantity of pectous substances. Compounds † pectous acid n. Obsolete = pectic acid n. at pectic adj. 1. 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 1866–77 H. Watts Dict. Chem. IV. 364 The conversion of the pectin into pectosic and pectous acids. This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022). < adj.1861
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