dextro-comb. form

Stress is usually determined by a subsequent element and vowels may be reduced accordingly. Some degree of stress is usually maintained on the second syllable. If the subsequent element is an existing word, it is likely to retain its original stress pattern, e.g. dextrogyrous adj. Brit.

/ˌdɛkstrə(ʊ)ˈdʒʌɪrəs/, U.S.

/ˌdɛkstrəˈdʒaɪrəs/,

/ˌdɛkstroʊˈdʒaɪrəs/.

Origin: A borrowing from Latin. Etymon: Latin dextro-.

Etymology: < classical Latin dextro-, combining form of dextr- , dexter (see dexterous adj.), used in the sense ‘(turning or turned) to the right’; compare -o- connective.Compare French dextro-.In dextrogyre adj. at sense 1 < French dextrogyre (1834 or earlier) < dextro- dextro- comb. form + ancient Greek γῦρος ring, circle, spiral (see gyro- comb. form).In dextro-racemic acid n. at sense 2 after French acide dextroracémique (1849 or earlier).In dextro-racemate n. at sense 2 after French dextroracémate (1849 or earlier).In dextro-tartrate at sense 2 after French dextro-tartrate (1850 or earlier).

combining form of Latin dexter, dextra, used in the sense ‘(turning or turned) to the right’, in physical and chemical terms, chiefly having reference to the property possessed by certain substances of causing the plane of a ray of polarized light to rotate to the right. Among these are:

1. dextrogyre adj.

/ˈdɛkstrəʊdʒaɪə(r)/ gyrating or circling to the right. dextroˈgyrate adj. characterized by turning the plane of polarization to the right, as a dextrogyrate crystal. dextroˈgyrous adj. = dextrogyre adj. dextro-roˈtation n. rotation to the right. dextro-ˈrotatory adj. having or producing rotation to the right; dextrogyrous.

ΘΚΠ

the world > matter > chemistry > isomerism > [adjective] > of or relating to stereo-isomerism > of or relating to optical isomerism > dextro-rotatory

right-handed1821

dextro-rotatory1876

D1894

1876 J. Harley Royle's Man. Materia Med. (ed. 6) 366 Called mycose, because it is rather less dextrogyre than cane sugar.

1877 M. Foster Text Bk. Physiol. ii. i. 170 The solutions of both acids have a dextrorotatory action on polarized light.

1882 Nature 19 Jan. 283/2 With each electrode, diverging currents produce dextro- and converging ones lævo-rotation.

1883 Athenæum 29 Dec. 871/1 The dextrorotatory and optically inactive gums.

1891 Lancet 3 Oct. 751 The dextro-rotatory tartaric acid.

2. dextro-ˈcompound n. a chemical compound which causes dextro-rotation. dextro-ˈglucose n. the ordinary variety of glucose n. or grape-sugar, dextrose n. dextro-raˈcemic acid n., dextro-tarˈtaric acid the modifications of racemic and tartaric acid which cause dextro-rotation. Hence dextro-racemate n., dextro-tartrate the salts of these.

ΚΠ

1853 Pharm. Jrnl. & Trans. 13 111 Pasteur discovered that racemic acid is a compound of two acids, one of which turns the plane of polarization of a ray of light to the right, and the other to the left; he therefore called them Dextro-racemic-acid and Levo-racemic-acid.

1853 Pharm. Jrnl. & Trans. 13 112 A solution of dextro-racemate of soda and ammonia.

1853 Pharm. Jrnl. & Trans. 13 377 The dextro-tartrate crystallizes out.

1863–72 H. Watts Dict. Chem. II. 855 Dextro-glucose occurs abundantly in sweet fruits, frequently together with cane sugar.

1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 796 Dextrotartaric Acid is the acid of..fruits.

This entry has not yet been fully updated (first published 1895; most recently modified version published online March 2022).

单词	dextro-
释义	dextro-comb. form Stress is usually determined by a subsequent element and vowels may be reduced accordingly. Some degree of stress is usually maintained on the second syllable. If the subsequent element is an existing word, it is likely to retain its original stress pattern, e.g. dextrogyrous adj. Brit. /ˌdɛkstrə(ʊ)ˈdʒʌɪrəs/, U.S. /ˌdɛkstrəˈdʒaɪrəs/, /ˌdɛkstroʊˈdʒaɪrəs/. Origin: A borrowing from Latin. Etymon: Latin dextro-. Etymology: < classical Latin dextro-, combining form of dextr- , dexter (see dexterous adj.), used in the sense ‘(turning or turned) to the right’; compare -o- connective.Compare French dextro-.In dextrogyre adj. at sense 1 < French dextrogyre (1834 or earlier) < dextro- dextro- comb. form + ancient Greek γῦρος ring, circle, spiral (see gyro- comb. form).In dextro-racemic acid n. at sense 2 after French acide dextroracémique (1849 or earlier).In dextro-racemate n. at sense 2 after French dextroracémate (1849 or earlier).In dextro-tartrate at sense 2 after French dextro-tartrate (1850 or earlier). combining form of Latin dexter, dextra, used in the sense ‘(turning or turned) to the right’, in physical and chemical terms, chiefly having reference to the property possessed by certain substances of causing the plane of a ray of polarized light to rotate to the right. Among these are: 1. dextrogyre adj. /ˈdɛkstrəʊdʒaɪə(r)/ gyrating or circling to the right. dextroˈgyrate adj. characterized by turning the plane of polarization to the right, as a dextrogyrate crystal. dextroˈgyrous adj. = dextrogyre adj. dextro-roˈtation n. rotation to the right. dextro-ˈrotatory adj. having or producing rotation to the right; dextrogyrous. ΘΚΠ the world > matter > chemistry > isomerism > [adjective] > of or relating to stereo-isomerism > of or relating to optical isomerism > dextro-rotatory right-handed1821 dextro-rotatory1876 D1894 1876 J. Harley Royle's Man. Materia Med. (ed. 6) 366 Called mycose, because it is rather less dextrogyre than cane sugar. 1877 M. Foster Text Bk. Physiol. ii. i. 170 The solutions of both acids have a dextrorotatory action on polarized light. 1882 Nature 19 Jan. 283/2 With each electrode, diverging currents produce dextro- and converging ones lævo-rotation. 1883 Athenæum 29 Dec. 871/1 The dextrorotatory and optically inactive gums. 1891 Lancet 3 Oct. 751 The dextro-rotatory tartaric acid. 2. dextro-ˈcompound n. a chemical compound which causes dextro-rotation. dextro-ˈglucose n. the ordinary variety of glucose n. or grape-sugar, dextrose n. dextro-raˈcemic acid n., dextro-tarˈtaric acid the modifications of racemic and tartaric acid which cause dextro-rotation. Hence dextro-racemate n., dextro-tartrate the salts of these. ΚΠ 1853 Pharm. Jrnl. & Trans. 13 111 Pasteur discovered that racemic acid is a compound of two acids, one of which turns the plane of polarization of a ray of light to the right, and the other to the left; he therefore called them Dextro-racemic-acid and Levo-racemic-acid. 1853 Pharm. Jrnl. & Trans. 13 112 A solution of dextro-racemate of soda and ammonia. 1853 Pharm. Jrnl. & Trans. 13 377 The dextro-tartrate crystallizes out. 1863–72 H. Watts Dict. Chem. II. 855 Dextro-glucose occurs abundantly in sweet fruits, frequently together with cane sugar. 1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 796 Dextrotartaric Acid is the acid of..fruits. This entry has not yet been fully updated (first published 1895; most recently modified version published online March 2022). < comb. form1853
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