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

• spirogyras
• spiroid
• spirometer
• spirometers
• spirometric
• spirometries
• spirometry
• spironolactone
• spironolactones
• spirophore
• spirophores
• spirt
• spirted
• spirting
• spirtle
• spirts
• spirulina
• spirulinae
• spirulinas
• spiry
• spissitude
• spissitudes
• spit
• spital
• spitals