Meaning
A hypothetical subatomic particle postulated to resolve certain symmetry problems concerning the strong nuclear force.
Etymology
Origin: Unknown
Coined by American physicist Frank Wilczek in 1978 after Axion, a brand of laundry detergent, for its -on suffix and the notion that the new particle could "clean up" a problem in physics. Also with relation to the axial current.
NYT Puzzle Appearances
No published puzzle dates on file for this word yet. It is part of the official NYT Spelling Bee word list for 2021, 2022, 2023, 2024, 2025, 2026.