Definition of "cogwheel" [cog•wheel]

• A toothed wheel. (noun)
• One of a set of cogged wheels within a mechanism. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The mighty horizontal cogwheel had thick wooden spikes which in turn fitted into the crevices of another vertical cog, and these wheels put four heavy beams in motion."
• "If you help the tax payer, he will spend money which in turn will begin the cogwheel of business."
• "I like the look of the book and would find the discussion of cogwheel trains interesting, especially were I back in the 2nd grade."