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W, 23d letter of the alphabet, in form a doubled u or v. It is the usual symbol of a voiced bilabial semivowel, as in the English wing. The same semivowel occurs as second member of the dipthongs au (as in house), ō, and o͞o. In twice the w represents a voiceless semivowel, which is heard also in some dialects that distinguish between where and wear. In chemistry W is the symbol for the element tungsten.
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McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
1. Abbr. for watt.
2. On drawings, abbr. for “west.”
3. On drawings, abbr. for “width.”
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
wattThe standard unit of measurement of electrical power. In a direct current (DC) circuit, one watt is one ampere of current flowing at one volt. In an alternating current (AC) circuit, watt ratings are a calculation of how the circuit reacts to the AC source. See volt-amps and RMS.
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