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top dead center[¦täp ′ded ′sen·tər]
The dead-center position of an engine piston and its crankshaft arm when at the top or outer end of its stroke.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
top dead center (TDC)
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved