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piggyback board[′pig·ē‚bak ‚bȯrd]
A small printed circuit board that is mounted on a larger board to provide additional circuitry.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
piggyback boardA small printed circuit board that plugs into another circuit board in order to enhance its capabilities. It does not plug into the motherboard, but would plug into the boards that plug into the motherboard. See piggybacking.
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