from The Century Dictionary and Cyclopedia
- n. A worm-wheel in which a spiral thread on the face of the disk drives a spur-gear the space of one tooth at each revolution, the shafts of the disk and gear being at right angles to each other.
- n. A type of wheel for cars or motor-vehicles in which the hub is connected to the rim by a continuous web or plate, instead of by spokes with open intervals between.
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