Meaning
any of four unstable subatomic particles, mesons, they are a combination of a strange quark or antiquark and either an up or down quark or antiquark
Etymology
Origin: Unknown
From contracted pronunciation of K-meson.
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 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026.