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

• unfriends
• unfriendship
• unfriendships
• unfrighted
• unfrightened
• unfrock
• unfrocked
• unfrocking
• unfrocks
• unfroze
• unfrozen
• unfructuous
• unfruitful
• unfruitfully
• unfruitfulness
• unfruitfulnesses
• unfuelled
• unfulfilled
• unfumed
• unfunded
• unfunny
• vernacularization
• vernacularize
• vernacularized
• vernacularizes