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orthopositronium
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Contents
1
English
1.1
Etymology
1.2
Noun
1.2.1
Related terms
English
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Etymology
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ortho-
+
positronium
Noun
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orthopositronium
(
uncountable
)
(
physics
,
attributive
)
The state of a
positronium
exotic atom
in which the
positron
and
electron
have
parallel
spins
Related terms
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parapositronium