hypertonic

adj hy·per·ton·ic \-ˈtän-ik\

Medical Definition of HYPERTONIC

: exhibiting excessive tone or tension <a hypertonic baby> <a hypertonic bladder>

: having a higher osmotic pressure than a surrounding medium or a fluid under comparison <animals that produce urine which is hypertonic to their blood>—compare hypotonic 2, isotonic 1

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