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atom trap

American  

noun

Physics.

  1. a device in which atoms or particles are slowed by the use of lasers and then confined to a small region of space.

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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.