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Definition of Top dead center
1. Noun. (automotive) A position in the four-stroke combustion process wherein the piston is at the topmost point in its stroke. This can either be during the ''compression phase'' or the ''combustion phase''. ¹
2. Noun. (automotive) The reference mark on a flywheel (and engine block) indicating the engine is in the '''top dead center''' position, when aligned. ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Top Dead Center
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