WordReference Random House Learner's Dictionary of American English © 2017
ˈneu•tron ˌbomb, n. [countable]
  • Militarya nuclear weapon designed to release a powerful burst of neutrons and gamma rays, with a weaker blast wave than other nuclear bombs.

  • WordReference Random House Unabridged Dictionary of American English © 2017
    neutron bomb′, 
  • a nuclear bomb designed to release radiation consisting mainly of neutrons, thus causing extensive loss of life but relatively little damage to buildings and property and only brief radioactive contamination. Also called  neutron radiation weap′on, N-bomb. 
    • 1955–60

    Collins Concise English Dictionary © HarperCollins Publishers::

    neutron bomb n
    1. a type of nuclear weapon designed to provide a high yield of neutrons but to cause little blast or long-lived radioactive contamination. The neutrons destroy all life in the target area, which theoretically can be entered relatively soon after the attack
      Technical name: enhanced radiation weapon

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