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a motor-driven saw, usually portable, in which the cutting teeth form links in a continuous chain
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
chain saw[′chān ‚sȯ]
A gasoline-powered saw for felling and bucking timber, operated by one person; has cutting teeth inserted in a sprocket chain that moves rapidly around the edge of an oval-shaped blade.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A power-driven saw, usually hand-held, for cutting wood; a protruding arm carries an endless chain, into which the cutting teeth are set.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.