AXLETREE
axletree
(noun) a dead axle on a carriage or wagon that has terminal spindles on which the wheels revolve
Source: WordNet® 3.1
Etymology
Noun
axletree (plural axletrees)
A bar or beam of wood or iron, connecting the opposite wheels of a carriage, on the ends of which the wheels revolve.
A spindle or axle of a wheel.
Source: Wiktionary
Ax"le*tree`, n. Etym: [Cf. Icel. öxultr.]
1. A bar or beam of wood or iron, connecting the opposite wheels of a
carriage, on the ends of which the wheels revolve.
2. A spindle or axle of a wheel. [Obs.]
Source: Webster’s Unabridged Dictionary 1913 Edition