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Mills grenade

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noun Military.
  1. a type of high-explosive grenade weighing about 1.5 pounds (0.7 kg).
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Origin of Mills grenade

1915–20; named after Sir W. Mills (1856–1932), its English inventor
Also called Mills bomb.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018