a mineral, copper arsenic sulfide, approximately Cu 3 AsS 3 : a copper ore and an end member of a series of solid solutions into which antimony enters to form tetrahedrite.
noun 1. attention; care; ministration, as to the sick. 2. Archaic. servants or attendants. noun 1. (rare) care and attention; ministration 2. (obsolete) attendants collectively
verb (used without object) 1. to be disposed or inclined in action, operation, or effect to do something: The particles tend to unite. 2. to be disposed toward an idea, emotion, way of thinking, etc.: He tends to be overly optimistic. Her religious philosophy tends toward pantheism. 3. to lead or conduce, as to some […]
noun 1. a state in the SE United States. 42,246 sq. mi. (109,415 sq. km). Capital: Nashville. Abbreviation: TN (for use with zip code), Tenn. 2. a river flowing from E Tennessee through N Alabama, W Tennessee, and SW Kentucky into the Ohio near Paducah. 652 miles (1050 km) long. noun 1. a state of […]
noun 1. TVA. Tennessee Valley Authority (TVA) A corporation created by the federal government in the Great Depression to promote the economic development of the Tennessee River and adjoining areas. The TVA, known as a builder of dams, is responsible for flood control, the generation of electric power, soil conservation, and other areas of economic […]