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luxon.

Any particle that travels at exactly the speed of light and has zero mass: typically a photon.

5 characters2 syllables approx.English language

Meaning & usage

noun/ˈlʌk.sɒn/Received-Pronunciation/ˈlʌk.sɑn/General-American
  1. Any particle that travels at exactly the speed of light and has zero mass: typically a photon.

Where this word comes from

From Latin lux (“light”) + -on.

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.