NYT Dictionary

NUCLIDE

/ˈn(j)uːklaɪd/

NounNU-clidenu-clide · 2 syllablesAdvanced/Professional

Accepted in official NYT Spelling Bee puzzle years: 2023, 2025

Meaning

An atomic nucleus specified by its atomic number and atomic mass.

Etymology

Origin: Unknown

From nucleus + -ide. Coined by American chemist Truman Kohman in 1947 in an article in the American Journal of Physics, in which he defines nuclide as "a species of atom characterized by the constitution of its nucleus, in particular by the numbers of protons and neutrons in its nucleus."

Synonyms & Antonyms

Synonyms

atomionshelltracer

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 2023, 2025.