Main Entry: iso·tope

Pronunciation: \ˈī-sə-ˌtōp\

Function: noun

Etymology: is- + Greek topos place

Date: 1913

1 : any of two or more species of atoms of a chemical element with the same atomic number and nearly identical chemical behavior but with differing atomic mass or mass number and different physical properties
2 : nuclide

— iso·to·pic \ˌī-sə-ˈtä-pik, -ˈtō-\ adjective

— iso·to·pi·cal·ly \-ˈtä-pi-k(ə-)lē, -ˈtō-\ adverb