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waterway a body of water, such as a river or stream, large enough for transportation.
water wheel a wheel turned by the weight of falling or running water, used to operate machinery. [2 definitions]
water wings an air-filled, wing-shaped device used to support the body of someone learning to swim.
water witch a person who searches for underground water with a divining rod; dowser. [3 definitions]
waterworks (used with a sing. or pl. verb) a system for storing, distributing, and purifying the water of a city or town.
waterworn worn, smoothed, or polished by the action of moving water.
watery pertaining to or consisting of water. [5 definitions]
WATS acronym of "Wide Area Telecommunications Service."
watt a unit of electrical power equal to the current of one ampere produced by the electromotive force of one volt, or to one joule per second. (abbr.: w, W)
wattage electrical power expressed in watts. [2 definitions]
watt-hour a unit of electrical energy equal to the energy of one watt operating for one hour, or 3,600 joules.
wattle a woven construction of twigs or branches used in building walls, fences, or roofs. [5 definitions]
wattmeter an instrument used to measure in watts the electrical power available in a given circuit.
Watusi a member of a people of Rwanda and Burundi.
waul to cry like a newborn baby or a cat; howl; wail; squall.
Wave a member of the WAVES.
wave a moving ridge or swell on the surface of a body of water. [13 definitions]
wave band a specific range of radio frequencies, such as those assigned for radio and television transmission.
wave-form a mathematical representation of the form of a wave, usu. plotted as a graph.
wave guide a piece of hollow metal tubing used for the conduction or directional transmission of microwaves.
wavelength the distance between two points in the progression of a wave, esp. of sound, electromagnetism, or the like. [2 definitions]