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Noun: spurion
  1. (particle physics) a hypothetical particle with a certain quantum number, introduced to allow application of conservation rules of that quantum number
    "a spurion is added to the left-hand side of the decay process, thus treating the decay as an isospin-conserving process"

Encyclopedia: Spurion

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spunky
spur
spur blight
spur gear
spur track
spur wheel
spurge
spurge family
spurge laurel
spurge nettle
spurion
spurious
spurious correlation
spurious wing
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spurner
spur-of-the-moment
spurred gentian