doubletree

[ duhb-uh l-tree ]
/ ˈdʌb əlˌtri /

noun

a pivoted bar with a whiffletree attached to each end, used in harnessing two horses abreast.

Origin of doubletree

1840–50, Americanism; modeled on singletree

Example sentences from the Web for doubletree

British Dictionary definitions for doubletree

doubletree
/ (ˈdʌbəlˌtriː) /

noun

a horizontal pivoted bar on a vehicle to the ends of which swingletrees are attached for harnessing two horses side by side