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cylinder head[′sil·ən·dər ‚hed]
The cap that serves to close the end of the piston chamber of a reciprocating engine, pump, or compressor.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
Normally, a removable top portion of an engine cylinder. It contains spark plugs, inlet and exhaust connections, and valves. See cylinder block.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved