isotopy

[ ahy-sot-uh-pee, ahy-suh-toh-pee ]
/ aɪˈsɒt ə pi, ˈaɪ səˌtoʊ pi /

noun Chemistry.

the quality or condition of being isotopic; isotopic character.

Origin of isotopy

First recorded in 1915–20; isotope + -y3
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019