heteropolaradj.

/ˌhɛtərəʊˈpəʊlə/

Etymology: < hetero- comb. form + polar adj.

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1. Botany. Having polar correspondence to something different from itself; having dissimilar poles, as in the figures called Stauraxonia heteropola ( Encycl. Brit. XVI. 844).

2. Of an electric generator or its operation: using armature conductors that pass alternate north and south magnetic poles, so that the current generated is periodically reversed. Cf. homopolar adj. 2.

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heteropolar1896

1896 S. P. Thompson Dynamo-electr. Machinery (ed. 5) 475 In cases where it [sc. a conductor] passes from being opposite a N-pole to being opposite a S-pole, the operation is said to be heteropolar.

1946 Nature 28 Sept. 455/1 For the majority of applications the modern heteropolar inductor alternator is the most suitable machine.

3. Chemistry. [ < German heteropolar (R. Abegg 1906, in Zeitschr. f. anorg. Chem. L. 309).] Formed by ions of opposite sign, between which there is electrostatic attraction. Cf. homopolar adj. 3.

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the world > matter > chemistry > chemical bonding > [adjective] > of or relating to electrostatic attraction

heteropolar1922

1922 A. D. Udden tr. N. Bohr Theory of Spectra iii. iii. 93 The latter kind of compounds, to which the greater number of simple inorganic compounds belong, is frequently called ‘heteropolar’ and possesses a far more typical character than the first compounds which are called ‘homoeopolar’.

1930 Engineering 5 Dec. 700/3 There were, further, different types of cohesive forces... (3) Ionic or heteropolar cohesion. In the rock-salt atom, for instance, the valency electron of the sodium migrated into the chlorine structure, giving rise to electrostatic action.

1964 J. W. Linnett Electronic Struct. Molecules ix. 143 Values which bring the results for these heteropolar molecules to the same scale as that for homopolar molecules.

This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2019).

单词	heteropolar
释义	heteropolaradj. /ˌhɛtərəʊˈpəʊlə/ Etymology: < hetero- comb. form + polar adj. Categories » 1. Botany. Having polar correspondence to something different from itself; having dissimilar poles, as in the figures called Stauraxonia heteropola ( Encycl. Brit. XVI. 844). 2. Of an electric generator or its operation: using armature conductors that pass alternate north and south magnetic poles, so that the current generated is periodically reversed. Cf. homopolar adj. 2. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > generator > [adjective] > periodically reversing heteropolar1896 1896 S. P. Thompson Dynamo-electr. Machinery (ed. 5) 475 In cases where it [sc. a conductor] passes from being opposite a N-pole to being opposite a S-pole, the operation is said to be heteropolar. 1946 Nature 28 Sept. 455/1 For the majority of applications the modern heteropolar inductor alternator is the most suitable machine. 3. Chemistry. [ < German heteropolar (R. Abegg 1906, in Zeitschr. f. anorg. Chem. L. 309).] Formed by ions of opposite sign, between which there is electrostatic attraction. Cf. homopolar adj. 3. ΘΚΠ the world > matter > chemistry > chemical bonding > [adjective] > of or relating to electrostatic attraction heteropolar1922 1922 A. D. Udden tr. N. Bohr Theory of Spectra iii. iii. 93 The latter kind of compounds, to which the greater number of simple inorganic compounds belong, is frequently called ‘heteropolar’ and possesses a far more typical character than the first compounds which are called ‘homoeopolar’. 1930 Engineering 5 Dec. 700/3 There were, further, different types of cohesive forces... (3) Ionic or heteropolar cohesion. In the rock-salt atom, for instance, the valency electron of the sodium migrated into the chlorine structure, giving rise to electrostatic action. 1964 J. W. Linnett Electronic Struct. Molecules ix. 143 Values which bring the results for these heteropolar molecules to the same scale as that for homopolar molecules. This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2019). < adj.1896
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