- one of two or more atoms having an equal number of neutrons but different atomic numbers.
Origin of isotone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- one of two or more atoms of different atomic number that contain the same number of neutrons
- One of two or more atoms whose nuclei have the same number of neutrons but different numbers of protons.