Pronunciation: (hī"pur-ton'ik), [key]
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).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.