AC

ac

(electricity)

alternating current

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aC

(electricity)

abcoulomb

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Ac

(chemistry)

actinium

(meteorology)

altocumulus cloud

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

AC

1. On drawings, abbr. for alternating current.

2. On drawings, abbr. for armored cable.

3. Abbr. for air conditioning.

4. Abbr. for “asbestos cement.”

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alternating current

An electric current that varies periodically in value and direction, first flowing in one direction in the circuit and then flowing in the opposite direction; each complete repetition is called a cycle, and the number of repetitions per second is called the frequency; usually expressed in Hertz (Hz).

McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

AC

(1) The latest Wi-Fi version. See 802.11ac.

(2) (Alternating Current) The common form of electricity from power plant to home and office. Its direction is reversed 60 times per second in the U.S.; 50 times in Europe. Contrast with DC.

Copyright © 1981-2025 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.