from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A pulley on a shaft that rests on or presses against a drive belt to guide it or take up slack. Also called idle wheel.
from the GNU version of the Collaborative International Dictionary of English
- adj. a pulley that rests upon a belt to tighten it; a pulley that only guides a belt and is not used to transmit power.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a pulley on a shaft that presses against a guide belt to guide or tighten it
Sorry, no etymologies found.