English

Definition of antimatter noun from the Oxford Advanced Learner's Dictionary

 

antimatter

 noun
noun
BrE BrE//ˈæntimætə(r)//
 
; NAmE NAmE//ˈæntimætər//
 
[uncountable] (physics) Molecules and matter
 
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matter that is made up of antiparticles See related entries: Molecules and matter
See the Oxford Advanced American Dictionary entry: antimatter