noun
antimatter
AN-tee-mat
noun
1
Matter made up of antiparticles, which have the same mass as ordinary particles but opposite charge, and which annihilate on contact with ordinary matter.
"Scientists have created tiny amounts of antimatter in particle accelerators."
"Science fiction often imagines antimatter as a fuel source powerful enough to drive starships."
How to Use Antimatter
Learner’s notesIn plain EnglishA form of matter that is the mirror-opposite of ordinary matter and destroys it on contact.
Word Forms
antimatters plural
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Scientists have created tiny amounts of _____ in particle accelerators.
Etymology
Coined in 1898 by physicist Arthur Schuster in a playful article about hypothetical matter that repels gravity, though the modern scientific meaning only took hold in the 1940s.