- 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.
* * *hy·per·ton·ic -'tän-ik adj1) 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)
* * *adj.2. describing muscles that demonstrate an abnormal increase in tonicity.
* * *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.
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 — 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
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