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Word of the Day Wednesday, June 10, 2026

pion

/piːɒn/ noun · British & US
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What does pion mean?

noun

A subatomic particle with a mass of approximately 140 MeV/c^2, composed of a quark and an antiquark. In physics, a pion is a meson that plays a key role in the strong nuclear force.

Example

"The physicist studied the properties of pions in high-energy particle collisions."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for pion

Rhymes with pion

Etymologically related