i 1 s 1 o 1 t 1 o 1 n 1 e 1
7 letters · 7 points in Scrabble
Meaning
originReinterpretation of the p in isotope as standing for proton, leading to a replacement with the letter n for neutron. Coined by German physicist Kurt Guggenheimer in 1934.
Etymology from Wiktionary, CC BY-SA 3.0