naphthaleneaceticadj.

Brit.

/ˌnafθəliːnəˈsiːtɪk/,

/ˌnapθəliːnəˈsiːtɪk/,

/ˌnafθəliːnəˈsɛtɪk/,

/ˌnapθəliːnəˈsɛtɪk/, U.S.

/ˈˌnæpθəˌlinəˈsɛdɪk/,

/ˈˌnæfθəˌlinəˈsɛdɪk/

Forms: 1900s– naphthaleneacetic, 1900s– naphthalene-acetic, 1900s– naphthalene acetic.

Origin: Formed within English, by compounding. Etymons: naphthalene n., acetic adj.

Etymology: < naphthalene n. + acetic adj.

Chemistry.

naphthaleneacetic acid n. either of two crystalline isomers, C₁₀H₇CH₂COOH, obtained by replacing one of the hydrogen atoms of naphthalene by an acetic acid group; spec. (more fully α-naphthaleneacetic acid) one which has the action of an auxin and is used to stimulate the rooting of plant cuttings, to initiate flowering of the pineapple, to prevent premature drop of fruit, and to improve the colour of apples.

ΘΚΠ

the world > matter > chemistry > organic chemistry > organic acids > [noun] > carboxylic acids > miscellaneous others

urobenzoic acid1836

adipic acid1838

azelaic acid1838

isethionic acid1838

rutinic acid1845

rutic acid1848

glyoxylic acid1856

malonic acid1859

piperic acid1863

butalanine1865

methacrylic acid1865

barbituric acid1866

pichuric acid1866

carboxylic acid1868

gluconic acid1871

xylic acid1872

xylidic acid1872

aconic acid1873

formobenzoic1873

nicotinic acid1873

hydracrylic acid1877

undecylenic acid1879

isonicotinic acid1883

isatoic acid1885

linolenic acid1887

hendecenoic acid1889

heptenoic acid1889

mannonic acid1890

phenolcarboxylic acid1893

naphthenic acid1894

aldonic acid1904

naphthaleneacetic acid1917

heptanoic acid1928

hexuronic acid1928

pantothenic acid1933

neuraminic acid1942

pantoic acid1945

penicillanic acid1953

mevalonic acid1957

retinoic acid1960

isobutyric acid-

1917 Chem. Abstr. 11 Index 3876/2 Naphthalene-acetic acids.

1936 Contrib. Boyce Thompson Inst. 8 78 Treating cuttings or shoots..with preparations of indoleacetic, indolepropionic, indolebutyric, or naphthaleneacetic acids induced earlier rooting.

1942 Science 22 May 536/1 Low concentrations of α-naphthaleneacetic acid (the compound used most extensively) applied as foliage sprays induced formation of inflorescences in advance of the normal period.

1968 F. C. Steward Growth & Organization in Plants viii. 394 The application of auxin during the dark period eliminates the photoperiodic induction due to the dark period in a short-day plant like cocklebur. Auxins, whether IAA or a synthetic substitute like naphthalene acetic acid..are all active in this respect.

2001 Jrnl. Japanese Jrnl. Hort. Sci. 70 185 The auxin naphthaleneacetic acid (NAA) clearly delayed berry ripening.

This entry has been updated (OED Third Edition, June 2003; most recently modified version published online March 2022).

单词	naphthaleneacetic
释义	naphthaleneaceticadj. Brit. /ˌnafθəliːnəˈsiːtɪk/, /ˌnapθəliːnəˈsiːtɪk/, /ˌnafθəliːnəˈsɛtɪk/, /ˌnapθəliːnəˈsɛtɪk/, U.S. /ˈˌnæpθəˌlinəˈsɛdɪk/, /ˈˌnæfθəˌlinəˈsɛdɪk/ Forms: 1900s– naphthaleneacetic, 1900s– naphthalene-acetic, 1900s– naphthalene acetic. Origin: Formed within English, by compounding. Etymons: naphthalene n., acetic adj. Etymology: < naphthalene n. + acetic adj. Chemistry. naphthaleneacetic acid n. either of two crystalline isomers, C₁₀H₇CH₂COOH, obtained by replacing one of the hydrogen atoms of naphthalene by an acetic acid group; spec. (more fully α-naphthaleneacetic acid) one which has the action of an auxin and is used to stimulate the rooting of plant cuttings, to initiate flowering of the pineapple, to prevent premature drop of fruit, and to improve the colour of apples. ΘΚΠ the world > matter > chemistry > organic chemistry > organic acids > [noun] > carboxylic acids > miscellaneous others urobenzoic acid1836 adipic acid1838 azelaic acid1838 isethionic acid1838 rutinic acid1845 rutic acid1848 glyoxylic acid1856 malonic acid1859 piperic acid1863 butalanine1865 methacrylic acid1865 barbituric acid1866 pichuric acid1866 carboxylic acid1868 gluconic acid1871 xylic acid1872 xylidic acid1872 aconic acid1873 formobenzoic1873 nicotinic acid1873 hydracrylic acid1877 undecylenic acid1879 isonicotinic acid1883 isatoic acid1885 linolenic acid1887 hendecenoic acid1889 heptenoic acid1889 mannonic acid1890 phenolcarboxylic acid1893 naphthenic acid1894 aldonic acid1904 naphthaleneacetic acid1917 heptanoic acid1928 hexuronic acid1928 pantothenic acid1933 neuraminic acid1942 pantoic acid1945 penicillanic acid1953 mevalonic acid1957 retinoic acid1960 isobutyric acid- 1917 Chem. Abstr. 11 Index 3876/2 Naphthalene-acetic acids. 1936 Contrib. Boyce Thompson Inst. 8 78 Treating cuttings or shoots..with preparations of indoleacetic, indolepropionic, indolebutyric, or naphthaleneacetic acids induced earlier rooting. 1942 Science 22 May 536/1 Low concentrations of α-naphthaleneacetic acid (the compound used most extensively) applied as foliage sprays induced formation of inflorescences in advance of the normal period. 1968 F. C. Steward Growth & Organization in Plants viii. 394 The application of auxin during the dark period eliminates the photoperiodic induction due to the dark period in a short-day plant like cocklebur. Auxins, whether IAA or a synthetic substitute like naphthalene acetic acid..are all active in this respect. 2001 Jrnl. Japanese Jrnl. Hort. Sci. 70 185 The auxin naphthaleneacetic acid (NAA) clearly delayed berry ripening. This entry has been updated (OED Third Edition, June 2003; most recently modified version published online March 2022). < adj.1917
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