Related Words

Permeability: A measure of the ease with which water penetrates a material.

Hydraulic Conductivity: A measure of the permeability of a rock or soil: the volume of flow through a unit surface in unit time with unit hydraulic pressure difference as the driving force.

Groundwater: Water under the earths surface, regardless of the geological structure in which the water is standing or flowing. It does not include water in underground streams that have identifiable bank . . . View Full Definition

Antidiuretic Hormone (ADH): A hormone produced by the hypothalamus and released by the pituitary gland that increases the permeability of the renal tubule of the nephron and thereby increases water reabsorption; also k . . . View Full Definition

Action Potential: A reversal of the electrical potential in the plasma membrane of a neuron that occurs when a nerve cell is stimulated; caused by rapid changes in membrane permeability to sodium and potassium.

Permalloy Tape Head: A cassette tape head constructed of permalloy, an alloy made primarily of nickel and iron, used for its superior high wear resistance and permeability, offering superior frequency response a . . . View Full Definition