cog
Concise Oxford English Dictionary © 2008 Oxford University Press:
cog/kɒɡ/
▶noun a wheel or bar with a series of projections on its edge, which transfers motion by engaging with projections on another wheel or bar.
■ each of such a series of projections.
– derivatives
cogged adjective.
cogged adjective.
– origin ME: prob. of Scand. origin.
'cog' also found in these Oxford entries:
