/ Dictionary / Index H hypotonic: Meaning and Definition of Find definitions for: hy•po•ton•ic Pronunciation: (hī"pu-ton'ik), [key] — adj. (of tissue) having less than the normal tone. noting a solution of lower osmotic pressure than another solution with which it is compared (opposed to hypertonic). Cf. isotonic (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hypotonic (Thesaurus) hypothyroidism hypotrachelium Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language