— hypertonicity /huy'peuhr toh nis"i tee/ , n.
/huy'peuhr ton"ik/ , adj.
1. Physiol. of or pertaining to hypertonia.
2. Physical Chem. noting a solution of higher osmotic pressure than another solution with which it is compared (opposed to hypotonic ). Cf. isotonic (def. 1).
[ 1850-55; HYPERTON(IA) + -IC ]