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

• the Fifteen
• the final solution
• the fine arts
• the fiscal question
• the five Ks
• the five wits
• the flat
• the Fleet
• the Flood
• the flowery land
• the Four Freedoms
• the four hundred
• the four seas
• the fourth estate
• the French Revolution
• theft
• theftboot
• theftboots
• theft-bote
• thefts
• theftuous
• theftuously
• the full monty
• the full treatment
• the F-word