ANTIMATTER
Meaning of ANTIMATTER in English
transcription, транскрипция: [ ˈan-tē-ˌma-tər, ˈan-ˌtī- ]
noun
Date: 1950
: matter composed of antiparticles
Merriam-Webster's Collegiate English vocabulary.
Энциклопедический словарь английского языка Merriam Webster.
2003