from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A wheel rimmed with toothlike projections, used to engage the links of a chain in a pulley or drive system.
from the GNU version of the Collaborative International Dictionary of English.
- (Mach.) Same as
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun thin wheel with teeth that engage with a chain
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