root pressure
noun Date: 1875 the chiefly osmotic pressure by which water rises into the stems of plants from the roots

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • Root pressure — Root pressure: osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves.Root pressure occurs in the xylem of some vascular plants when the soil moisture level is high either at night or when… …   Wikipedia

  • root pressure — Bot. osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves. [1870 75] * * * ▪ botany       in plants (plant), force that helps to drive fluids upward into the water conducting vessels (… …   Universalium

  • root pressure — noun : the chiefly osmotic pressure or force by which water rises into the stems of plants from the roots * * * Bot. osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves. [1870 75] * * *… …   Useful english dictionary

  • root pressure — root′ pres sure n. pln the osmotic pressure within the cells of a root system that causes water to rise to stems and leaves • Etymology: 1870–75 …   From formal English to slang

  • root pressure — noun The pressure (the result of osmosis) exerted by the roots of vascular plants that moves water into the leaves and causes guttation …   Wiktionary

  • root — root1 rootlike, adj. /rooht, root/, n. 1. a part of the body of a plant that develops, typically, from the radicle and grows downward into the soil, anchoring the plant and absorbing nutriment and moisture. 2. a similar organ developed from some… …   Universalium

  • Root — /rooht/, n. 1. Elihu /el euh hyooh /, 1845 1937, U.S. lawyer and statesman: Nobel peace prize 1912. 2. John Wellborn /wel beuhrn/, 1851 91, U.S. architect. * * * In botany, the underground anchoring part of a plant. It grows downward in response… …   Universalium

  • root sleeve fibrosis — fibrosis and thickening of the dura mater resulting from prolonged nerve root pressure …   Medical dictionary

  • Pressure measurement — The construction of a bourdon tube gauge, construction elements are made of brass Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure pressure are called pressure gauges or vacuum gauges. A… …   Wikipedia

  • Pressure neuropathy — “Pinching” a nerve by putting too much pressure on it. For example, the sciatic nerve may be painfully compressed by a ruptured disc in the lower spine, causing sciatica. Pressure neuropathy is also called nerve compression. In… …   Medical dictionary

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