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positron Definition
Dictionary Home
»
Words Starting with P
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Portuguese man-of-war ... postman's knock
» positron
positron
noun
1.
physics.
An
antiparticle
that has the same mass as an electron, and an equal but opposite charge. See also
PET
.
Etymology
: 1930s: a contraction of
posi
tive elec
tron
.
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