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

• duck-footed
• duck-hawk
• duck-hawks
• duck hook
• duck hooks
• duckier
• duckies
• duckiest
• ducking
• ducking-pond
• ducking-ponds
• duckings
• ducking-stool
• ducking-stools
• duck-legged
• duckling
• ducklings
• duckmole
• duckmoles
• duck out of
• duck-pond
• duck-ponds
• ducks
• duck's arse
• duck's-foot