from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The toothed wheel of a worm gear.
from the GNU version of the Collaborative International Dictionary of English
- n. a cogwheel having teeth formed to fit into the spiral spaces of a screw called a worm, so that the wheel may be turned by, or may turn, the worm; -- called also worm gear, and sometimes tangent wheel. See Illust. of Worm gearing, above.
from The Century Dictionary and Cyclopedia
- n. A wheel which gears with an endless or tangent screw or worm, receiving or imparting motion.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. gear with the thread of a worm
Sorry, no etymologies found.