hypertonic

hy·per·ton·ic

adj \-ˈtän-ik\

Definition of HYPERTONIC

1

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

2

: 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