from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A gear with teeth radially arrayed on the rim parallel to its axis.
from the GNU version of the Collaborative International Dictionary of English
- n. a cogwheel having teeth which project radially and stand parallel to the axis; a spur wheel.
from The Century Dictionary and Cyclopedia
- n. Same as spur-gearing.
- n. Toothed gearing for transmission of motion and power in which the pitch-surfaces from which the teeth are developed are cylinders with elements parallel to the axis.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. gear wheels that mesh in the same plane
Sorry, no etymologies found.