ANTIMATTER
Meaning of ANTIMATTER in English
n.
Pronunciation: ' an-t ē - ˌ ma-t ə r, ' an- ˌ t ī -
Function: noun
Date: 1950
: matter composed of antiparticles
Merriam Webster Collegiate English Dictionary.
Merriam Webster - Энциклопедический словарь английского языка.
2012