hypotonic

hy·po·ton·ic

adj \ˌhī-pə-ˈtän-ik, -pō-\

Definition of HYPOTONIC

1

: having deficient tone or tension <hypotonic children>

2

: having a lower osmotic pressure than a surrounding medium or a fluid under comparison <a hypotonic solution>—compare hypertonic 2, isotonic 1

—hy·po·ton·i·cal·ly \-i-k(ə-)lē\ adverb