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

• doormat
• doormats
• doormen
• doorn
• doornail
• doornails
• doornboom
• doornbooms
• doorns
• door-plate
• door-plates
• doorpost
• doorposts
• doors
• door-sill
• door-sills
• doors-man
• doorsman
• doors-men
• door-stead
• door-steads
• doorstep
• doorstepped
• doorstepper
• doorsteppers