Loading page
say it: a-tahy-MAT-ur
antimatter is a noun meaning "matter consisting of elementary particles that are the antiparticles of those making up normal substances". It is pronounced /ætaɪˈmætɚ/ — a-tahy-MAT-ur. It carries one recorded sense.
matter consisting of elementary particles that are the antiparticles of those making up normal substances
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for antimatter come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.