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

• fiançailles
• fiar
• fiars
• fiars prices
• fiasco
• fiascoes
• fiascos
• fiat
• fiat currency
• fiated
• fiating
• fiat money
• fiat monies
• fiats
• fiaunt
• fib
• fibbed
• fibber
• fibberies
• fibbers
• fibbery
• fibbing
• fiber
• fiberboard
• fiberboards