positronium
pos·i·tro·ni·um
noun \ˌpä-zə-ˈtrō-nē-əm\Definition of POSITRONIUM
: a short-lived system that consists of a positron and an electron bound together and is suggestive of a hydrogen atom
First Known Use of POSITRONIUM
1945
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Previous Word in the Dictionary: positron–emission tomography
All Words Near: positronium
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