(physics) Any of a number of nuclides of different elements that have the same number of neutrons

(mathematics) monotone nondecreasing.

plural of isotone

(of two solutions) Having the same osmotic pressure. / (of a medical solution) Having the same concentration of solutes as human blood. / (of two muscles) Having equal tension.

In an isotonic way.

The state of being isotonic, or extent to which something is isotonic.

Isotonic exercises.

The process, or the result of isotonizing

To make isotonic

simple past tense and past participle of isotonize