A wheel with grooves (teeth) engraved on the outer circumference, such that two such devices can interlock and convey motion from one to the other.
1 The driving gear too, with the exception of one cog wheel , was in workable order.
2 Now I'll put a plug in there, and the cog wheel won't come loose again.
3 If these are all right, you will find that either a pulley or a little cog wheel is loose.
4 The internal fittings and cog wheels were also wood.
5 They were literally covered with cog wheels , levers, handles, springs, pieces of machinery, patterns, models, and strange devices.
6 The old man puffed, puffed, and his vrouw clicked her knitting needles, as if regulated by internal cog wheels .
7 When a man tries to stop a great machine by putting his impudent fingers into the cog wheels , the man's a fool.
8 There was a gasp from the audience, and one could almost see the mental cog wheels of sixty girls going furiously to work.
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