hypertonic

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 cells shrink. SYN: hyperisotonic.

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hy·per·ton·ic -'tän-ik adj
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 <animals that produce urine which is \hypertonic to their blood> compare HYPOTONIC (2), isotonic (1)

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adj.
1. describing a solution that has a greater osmotic pressure than another solution. See osmosis.
2. describing muscles that demonstrate an abnormal increase in tonicity.

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hy·per·ton·ic (hi″pər-tonґik) 1. denoting a solution which when bathing body cells causes a net flow of water across the semipermeable cell membrane out of the cell. 2. denoting a solution having a greater tonicity than another solution, e.g., the blood, with which it is compared. 3. exhibiting hypertonia.

Medical dictionary. 2011.

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Look at other dictionaries:

  • 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 — 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 solution — hypertonic solution. См. гипертонический раствор. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • hypertonic solution — hipertoninis tirpalas statusas T sritis chemija apibrėžtis Tirpalas, kurio osmosinis slėgis didesnis už lyginamojo tirpalo slėgį. atitikmenys: angl. hypertonic solution rus. гипертонический раствор …   Chemijos terminų aiškinamasis žodynas

  • 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 — adjective a) having a greater osmotic pressure than another b) having a very high muscular tension; spastic Ant: hypotonic …   Wiktionary

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