asymmetryn.

/əˈsɪmɛtri/

Etymology: < ancient Greek ἀσυμμετρία < ἀσύμμετρος + -ια -ia suffix¹ (see symmetry n.).

1. Mathematics. The relation of two quantities which have no common measure, as 1 and √2; incommensurability. ? Obsolete.

ΘΚΠ

the world > relative properties > number > mathematical number or quantity > [noun] > relationship between quantities > incommensurable

incommensurability1570

asymmetrya1652

incommensurableness1681

incommensurable1741

a1652 J. Smith Select Disc. (1660) iv. v. 93 Æquality, Proportion, Symmetry and asymmetry of Magnitudes.

1675 J. Collins Let. in S. P. Rigaud & S. J. Rigaud Corr. Sci. Men 17th Cent. (1841) (modernized text) II. 264 The method of shunning asymmetries mentioned in Des Cartes.

1796 in C. Hutton Math. & Philos. Dict. I. 162.

a. Want of symmetry, defective correspondence between things or their parts, disproportion.

ΘΚΠ

the world > space > shape > misshapenness > [noun] > asymmetry

dextrality1646

asymmetry1664

one-sidedness1830

lopsidedness1843

dissymmetry1844

unsymmetry1867

sidedness1888

the world > space > relative position > arrangement or fact of being arranged > other specific arrangements > [noun] > balanced arrangement > not

asymmetry1664

1664 J. Evelyn in tr. R. Fréart Parallel Antient Archit. Ep. Ded. sig. *b^v The asymmetrie of our Buildings.

1664 J. Worthington Life Mede in J. Mede Wks. p. lix There was an asymmetry and disproportion in the subservient Faculties.

1877 T. H. Huxley Man. Anat. Invertebrated Animals viii. 530 Male Cephalopods are distinguished..by the asymmetry of their arms.

1948 S. Glasstone Textbk. Physical Chem. xii. 904 The influence on the velocity of the ion is known as the relaxation effect, or sometimes as the asymmetry effect, because it arises from the lack of symmetry in the electrical atmosphere of a moving ion.

b. Chemistry. Lack of symmetry in the spatial arrangement of atoms or groups in a molecule; = stereoisomerism n. at stereo- comb. form .

ΘΚΠ

the world > matter > chemistry > isomerism > [noun] > stereo-isomerism

asymmetry1875

stereoisomerism1894

physical isomerism1896

stereomerism1898

1875 Jrnl. Chem. Soc. 28 862 He [sc. J. H. van't Hoff] has deduced the following rules... Derivatives of optically active combinations lose their rotatory power when the asymmetry of their carbon-atoms disappears.

1885 Encycl. Brit. XIX. 314/1 What peculiarity of constitution can give a molecule this helicoidal asymmetry?

1902 Encycl. Brit. XXVI. 721/1 The doctrine of asymmetry may be extended to elements other than carbon.

1959 Chambers's Encycl. III. 357/2 When two of the four attached groups are similar, as in propionic acid,..the asymmetry vanishes together with the possibility of optical isomerism.

This entry has not yet been fully updated (first published 1885; most recently modified version published online December 2018).

单词	asymmetry
释义	asymmetryn. /əˈsɪmɛtri/ Etymology: < ancient Greek ἀσυμμετρία < ἀσύμμετρος + -ια -ia suffix¹ (see symmetry n.). 1. Mathematics. The relation of two quantities which have no common measure, as 1 and √2; incommensurability. ? Obsolete. ΘΚΠ the world > relative properties > number > mathematical number or quantity > [noun] > relationship between quantities > incommensurable incommensurability1570 asymmetrya1652 incommensurableness1681 incommensurable1741 a1652 J. Smith Select Disc. (1660) iv. v. 93 Æquality, Proportion, Symmetry and asymmetry of Magnitudes. 1675 J. Collins Let. in S. P. Rigaud & S. J. Rigaud Corr. Sci. Men 17th Cent. (1841) (modernized text) II. 264 The method of shunning asymmetries mentioned in Des Cartes. 1796 in C. Hutton Math. & Philos. Dict. I. 162. 2. a. Want of symmetry, defective correspondence between things or their parts, disproportion. ΘΚΠ the world > space > shape > misshapenness > [noun] > asymmetry dextrality1646 asymmetry1664 one-sidedness1830 lopsidedness1843 dissymmetry1844 unsymmetry1867 sidedness1888 the world > space > relative position > arrangement or fact of being arranged > other specific arrangements > [noun] > balanced arrangement > not asymmetry1664 1664 J. Evelyn in tr. R. Fréart Parallel Antient Archit. Ep. Ded. sig. b^v The asymmetrie of our Buildings. 1664 J. Worthington Life Mede* in J. Mede Wks. p. lix There was an asymmetry and disproportion in the subservient Faculties. 1877 T. H. Huxley Man. Anat. Invertebrated Animals viii. 530 Male Cephalopods are distinguished..by the asymmetry of their arms. 1948 S. Glasstone Textbk. Physical Chem. xii. 904 The influence on the velocity of the ion is known as the relaxation effect, or sometimes as the asymmetry effect, because it arises from the lack of symmetry in the electrical atmosphere of a moving ion. b. Chemistry. Lack of symmetry in the spatial arrangement of atoms or groups in a molecule; = stereoisomerism n. at stereo- comb. form . ΘΚΠ the world > matter > chemistry > isomerism > [noun] > stereo-isomerism asymmetry1875 stereoisomerism1894 physical isomerism1896 stereomerism1898 1875 Jrnl. Chem. Soc. 28 862 He [sc. J. H. van't Hoff] has deduced the following rules... Derivatives of optically active combinations lose their rotatory power when the asymmetry of their carbon-atoms disappears. 1885 Encycl. Brit. XIX. 314/1 What peculiarity of constitution can give a molecule this helicoidal asymmetry? 1902 Encycl. Brit. XXVI. 721/1 The doctrine of asymmetry may be extended to elements other than carbon. 1959 Chambers's Encycl. III. 357/2 When two of the four attached groups are similar, as in propionic acid,..the asymmetry vanishes together with the possibility of optical isomerism. This entry has not yet been fully updated (first published 1885; most recently modified version published online December 2018). < n.a1652
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