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

• sulkinesses
• sulking
• sulks
• sulky
• sullage
• sullages
• sullen
• sullener
• sullenest
• sullenly
• sullenness
• sullennesses
• sullied
• sullies
• sully
• sullying
• sulph-
• sulpha
• sulphacetamide
• sulphacetamides
• sulphadiazine
• sulphadiazines
• sulphadimidine
• sulphamethoxazole
• sulphanilamide