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torsion-free group

American

[tawr-shuhn-free] / ˈtɔr ʃənˌfri /

noun

Mathematics.

a group in which every element other than the identity has infinite order.

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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.