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

• backhands
• back-heel
• back-heeled
• back-heeling
• back-heels
• backhoe
• backhoe loader
• backhoes
• backing
• backing-down
• backings
• backing storage
• backing store
• backing track
• backing tracks
• back in the day
• back issue
• back issues
• backland
• backlands
• back lane
• back lanes
• backlash
• backlashes
• backless