indolen.

Brit.

/ˈɪndəʊl/, U.S.

/ˈɪnˌdoʊl/

Forms: Also indol.

Etymology: < ind- (in indo- comb. form²) + -ole suffix², < Latin oleum oil. (Not -ol, as indole has not the structure of an alcohol.)

Chemistry.

a. A crystallizable substance (C₈H₇N), called also ketole, formed in large shining colourless laminæ, having a peculiar but not very powerful odour; it is obtained artificially by reduction of indigo-blue, and occurs in small quantities in human excrement. The plural indoles is applied to alkylated derivatives of indole. indole group, a name for the group including indole, isatin, indigo, and related compounds and derivatives.

ΘΚΠ

the world > matter > chemistry > organic chemistry > organic compounds > [noun] > heterocyclic compounds > containing nitrogen > indoles

indole1869

1869 H. E. Roscoe Lessons Elem. Chem. (new ed.) xxxix. 390 Indol is a crystalline substance which forms the starting-point of the indigo series.

1872 H. Watts Dict. Chem. VI. 733 Indol, C₈H₇N..may be regarded as the nucleus of the indigo-group.

1881 H. Watts Dict. Chem. 3rd Suppl. ii. 1089 The clear ethereal solution leaves on distillation a reddish oil with the characteristic smell of indole.

1886 New Sydenham Soc. Lexicon (at cited word) Indol..when fused with potash forms aniline, and when in solution forms with ozone indigo-blue.

1892 M. M. P. Muir & H. F. Morley Watts' Dict. Chem. Indole.

b. indoleacetic acid n. any of the seven isomeric acetic acid derivatives, C₈H₆N·CH₂COOH, of indole; esp. the one having the acetic acid side-chain substituted in the 3- (or β-) position, which is an important natural growth hormone in plants.

ΚΠ

1886 Jrnl. Chem. Soc. 50 806 Methylindoleacetic acid, NH^{C₆H₄}_CMeC.CH₂.COOH, is prepared by heating phenylhydrazinelevulinic acid..with zinc chloride.

1957 New Biol. 23 17 Among the naturally occurring auxins, β-indoleacetic acid is widely, if not perhaps universally, distributed in the higher plants.

1958 Plant Physiol. XXXIII. 317 (table) Relative activity of indole-4-acetic acid (I-4-AA) on Avena coleoptile sections, and test for interaction with indole-3-acetic acid.

This entry has not yet been fully updated (first published 1900; most recently modified version published online March 2022).

† indoleadj.

Etymology: < medieval Latin indolus, < in- (in- prefix⁴) + dolus guile.

Obsolete. rare.

Guileless.

ΘΚΠ

the world > action or operation > behaviour > unaffectedness or naturalness > [adjective] > artless, guileless, or innocent

simple?c1225

innocenta1382

simple-hearted?c1425

unsubtlea1500

indolec1550

naïfc1598

sacklessa1600

plain-hearted1601

unnooked1602

unguileful1604

onefold1606

naivea1614

innocentious1624

innocential1628

excuseless1640

uncrafty1647

craftless1650

ingenuousa1662

innocentive1661

unartful1703

artless1714

ingénue1848

blue-eyed1903

c1550 Complaynt Scotl. (1979) xv. 99 His ȝongest sone beniemyn vas indole and innocent.

This entry has not yet been fully updated (first published 1900; most recently modified version published online June 2021).

单词	indole
释义	indolen. Brit. /ˈɪndəʊl/, U.S. /ˈɪnˌdoʊl/ Forms: Also indol. Etymology: < ind- (in indo- comb. form²) + -ole suffix², < Latin oleum oil. (Not -ol, as indole has not the structure of an alcohol.) Chemistry. a. A crystallizable substance (C₈H₇N), called also ketole, formed in large shining colourless laminæ, having a peculiar but not very powerful odour; it is obtained artificially by reduction of indigo-blue, and occurs in small quantities in human excrement. The plural indoles is applied to alkylated derivatives of indole. indole group, a name for the group including indole, isatin, indigo, and related compounds and derivatives. ΘΚΠ the world > matter > chemistry > organic chemistry > organic compounds > [noun] > heterocyclic compounds > containing nitrogen > indoles indole1869 1869 H. E. Roscoe Lessons Elem. Chem. (new ed.) xxxix. 390 Indol is a crystalline substance which forms the starting-point of the indigo series. 1872 H. Watts Dict. Chem. VI. 733 Indol, C₈H₇N..may be regarded as the nucleus of the indigo-group. 1881 H. Watts Dict. Chem. 3rd Suppl. ii. 1089 The clear ethereal solution leaves on distillation a reddish oil with the characteristic smell of indole. 1886 New Sydenham Soc. Lexicon (at cited word) Indol..when fused with potash forms aniline, and when in solution forms with ozone indigo-blue. 1892 M. M. P. Muir & H. F. Morley Watts' Dict. Chem. Indole. b. indoleacetic acid n. any of the seven isomeric acetic acid derivatives, C₈H₆N·CH₂COOH, of indole; esp. the one having the acetic acid side-chain substituted in the 3- (or β-) position, which is an important natural growth hormone in plants. ΚΠ 1886 Jrnl. Chem. Soc. 50 806 Methylindoleacetic acid, NH^{C₆H₄}_CMeC.CH₂.COOH, is prepared by heating phenylhydrazinelevulinic acid..with zinc chloride. 1957 New Biol. 23 17 Among the naturally occurring auxins, β-indoleacetic acid is widely, if not perhaps universally, distributed in the higher plants. 1958 Plant Physiol. XXXIII. 317 (table) Relative activity of indole-4-acetic acid (I-4-AA) on Avena coleoptile sections, and test for interaction with indole-3-acetic acid. This entry has not yet been fully updated (first published 1900; most recently modified version published online March 2022). † indoleadj. Etymology: < medieval Latin indolus, < in- (in- prefix⁴) + dolus guile. Obsolete. rare. Guileless. ΘΚΠ the world > action or operation > behaviour > unaffectedness or naturalness > [adjective] > artless, guileless, or innocent simple?c1225 innocenta1382 simple-hearted?c1425 unsubtlea1500 indolec1550 naïfc1598 sacklessa1600 plain-hearted1601 unnooked1602 unguileful1604 onefold1606 naivea1614 innocentious1624 innocential1628 excuseless1640 uncrafty1647 craftless1650 ingenuousa1662 innocentive1661 unartful1703 artless1714 ingénue1848 blue-eyed1903 c1550 Complaynt Scotl. (1979) xv. 99 His ȝongest sone beniemyn vas indole and innocent. This entry has not yet been fully updated (first published 1900; most recently modified version published online June 2021). < n.1869adj.c1550
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