isotonic /ī-sō-tonˈik/

1. Having the same tone, tension or osmotic pressure
2. (of muscular contraction) shortening the muscle fibres and moving a joint
3. (of an energy drink) containing salts and minerals of the same concentration as in the body

isotonicˈity noun

• unsteadying
• unsteel
• unsteeled
• unsteeling
• unsteels
• unstep
• unstepped
• unstepping
• unsteps
• unstercorated
• unsterile
• unsterilised
• unsterilized
• unstick
• unsticking
• unsticks
• unstifled
• unstigmatised
• unstigmatized
• unstilled
• unstimulated
• unstinted
• unstinting
• unstirred
• unstitch