axle

1. The pin or spindle on which a wheel revolves, or which revolves with a wheel. 2. A transverse bar or shaft connecting the opposite wheels of a car or carriage; an axletree. 3. An axis; as, the sun's axle. Had from her axle torn The steadfast earth. Milton. Note: Railway axles are called leading and trailing from their position in the front or in the rear of a car or truck respectively.

Source: Webster's Revised Unabridged Dictionary (1913), United States public domain. See methodology for full licensing detail. Word validity for game play may differ from any official game dictionary.