"isotonic" in the adjective sense
1. isotonic, isosmotic
used of solutions) having the same or equal osmotic pressure
2. isotonic
relating to or characterized by the equal intervals of a musical scale
"isotonic tuning"
3. isotonic
of or involving muscular contraction in which tension is constant while length changes
4. isotonic
of two or more muscles having equal tension
Source: WordNet® (An amazing lexical database of English)
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