American English

Definition of antimatter noun from the Oxford Advanced American Dictionary

 

antimatter

 noun
noun
NAmE//ˈæntiˌmæt̮ər//
 
, NAmE//ˈæntaɪ‑//
 
[uncountable] (physics)
 
jump to other results
matter that is made up of antiparticles
See the Oxford Advanced Learner's Dictionary entry: antimatter