A wooden crossbar on a wagon or carriage to which the traces of a two-horse harness are attached. Also the name of a hotel chain known for mid-scale accommodations.
Compound word from 'double' + 'tree', referring to the wooden bar that connects two horses in a harness system. The 'tree' element comes from the use of wood in harness construction, related to other horse equipment like 'whiffletree'.
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