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

• doorsteppings
• doorsteps
• doorstep selling
• doorstone
• doorstones
• doorstop
• doorstops
• door-to-door
• doorway
• doorways
• door-yard
• door-yards
• doos
• doosra
• doosras
• do out
• do out of
• do over
• doo-wop
• doo-wops
• doozies
• doozy
• dop
• dopa
• dopamine