a) having a greater osmotic pressure than another
b) having a very high muscular tension; spastic

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  • hypertonic — hy per*ton ic, n. [Pref. hyper + tonic.] (Physiology, Biochemistry) Having a higher osmotic pressure than a comparison solution; of an aqueous solution. Increasing the concentration of dissolved solids increases the osmotic pressure, and thus the …   The Collaborative International Dictionary of English

  • hypertonic — 1855, from HYPER (Cf. hyper ) + TONIC (Cf. tonic). Related: Hypertonia; hypertonicity …   Etymology dictionary

  • hypertonic — [hī΄pər tän′ik] adj. 1. having abnormally high tension or tone, esp. of the muscles 2. having an osmotic pressure higher than that of an isotonic solution …   English World dictionary

  • hypertonic — 1. Having a greater degree of tension. SYN: spastic (1). 2. Having a greater osmotic pressure than a reference solution, which is ordinarily assumed to be blood plasma or interstitial fluid; more specifically, refers to a fluid in which c …   Medical dictionary

  • hypertonic — adjective Etymology: International Scientific Vocabulary Date: 1855 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 …   New Collegiate Dictionary

  • hypertonic — having an osmotic pressure higher than that of the environment, e.g. a fish in fresh water is hypertonic to its environment (and hence tends to lose salts and be flooded by water). Opposite to hypotonic …   Dictionary of ichthyology

  • hypertonic — Of a fluid, sufficiently concentrated to cause osmotic shrinkage of cells immersed in it. Note that a mildly hyperosmotic solution is not necessarily hypertonic for viable cells, that are capable of regulating their volumes by active transport.… …   Dictionary of molecular biology

  • hypertonic — 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) …   Universalium

  • hypertonic — adj. having excessive muscular tone or tension …   English contemporary dictionary

  • hypertonic — [ˌhʌɪpə tɒnɪk] adjective 1》 Biology having a higher osmotic pressure than a particular fluid. 2》 Physiology of or in a state of abnormally high muscle tone. Derivatives hypertonia noun hypertonicity noun …   English new terms dictionary

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