antiparalleladj.n.

/æntɪˈpærələl/

†1. Parallel, but opposed or contrary. Obs. rare.

ΘΚΠ

the world > relative properties > relationship > contrariety or contrast > [adjective] > parallel but contrary

antiparallela1660

a1660 H. Hammond Serm. (1664) xiii. 208 To take the opposite course to them, and to provide our remedy antiparallel to their disease.

2. Geom. antiparallel lines or antiparallels: two lines which make with two other lines angles equal each to each, but contrary ways, one being exterior and the other interior.

ΚΠ

1796 C. Hutton Math. & Philos. Dict. I. 122.

3. Physics. Parallel but moving or directed in opposite directions: used chiefly of vectors. Also as adv.

ΘΚΠ

the world > matter > physics > quantum theory > electron spin > [adjective] > parallel in opposite directions

antiparallel1927

1927 C. G. Darwin in Proc. Royal Soc. A. 116 230 When the electron wave is analysed by a Stern-Gerlach experiment, the associated rays (or particles) are polarised anti~parallel.

1938 F. Bitter in Physical Rev. 54 81/2 The case in which the internal forces are such as to make interacting spins antiparallel to each other.

1949 Physical Rev. 76 1257/1 At absolute zero all of the atoms on one lattice have their electronic magnetic moments aligned in the same direction and all of the atoms on the other lattice have their moments antiparallel to the first. Above the Curie temperature the thermal energy is sufficient to overcome the tendency of the atoms to lock antiparallel... Materials exhibiting the characteristics described above have been designated ‘antiferromagnetic’.

1961 Encycl. Dict. Physics I. 222/1 The state of complete antiferromagnetism (antiparallel alignment of spin vectors) will be attained only at absolute zero.

This entry has not yet been fully updated (first published 1885; most recently modified version published online March 2011).

单词	antiparallel
释义	antiparalleladj.n. /æntɪˈpærələl/ †1. Parallel, but opposed or contrary. Obs. rare. ΘΚΠ the world > relative properties > relationship > contrariety or contrast > [adjective] > parallel but contrary antiparallela1660 a1660 H. Hammond Serm. (1664) xiii. 208 To take the opposite course to them, and to provide our remedy antiparallel to their disease. 2. Geom. antiparallel lines or antiparallels: two lines which make with two other lines angles equal each to each, but contrary ways, one being exterior and the other interior. ΚΠ 1796 C. Hutton Math. & Philos. Dict. I. 122. 3. Physics. Parallel but moving or directed in opposite directions: used chiefly of vectors. Also as adv. ΘΚΠ the world > matter > physics > quantum theory > electron spin > [adjective] > parallel in opposite directions antiparallel1927 1927 C. G. Darwin in Proc. Royal Soc. A. 116 230 When the electron wave is analysed by a Stern-Gerlach experiment, the associated rays (or particles) are polarised anti~parallel. 1938 F. Bitter in Physical Rev. 54 81/2 The case in which the internal forces are such as to make interacting spins antiparallel to each other. 1949 Physical Rev. 76 1257/1 At absolute zero all of the atoms on one lattice have their electronic magnetic moments aligned in the same direction and all of the atoms on the other lattice have their moments antiparallel to the first. Above the Curie temperature the thermal energy is sufficient to overcome the tendency of the atoms to lock antiparallel... Materials exhibiting the characteristics described above have been designated ‘antiferromagnetic’. 1961 Encycl. Dict. Physics I. 222/1 The state of complete antiferromagnetism (antiparallel alignment of spin vectors) will be attained only at absolute zero. This entry has not yet been fully updated (first published 1885; most recently modified version published online March 2011). < adj.n.a1660
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