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Dictionary

  Definition of antiparticle
  1. a particle that has the same mass as another particle but has opposite values for its other properties; interaction of a particle and its antiparticle results in annihilation and the production of radiant energy
Substance Meronyms: antimatter

 

 
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unlined means not having a lining or liner; "a thin unlined jacket"; used especially of skin; "his cheeks were unlined"; "his unseamed face"; ... more
 
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