singletree Meaning, Definition & Usage

Sin"gle*tree` noun
Etymology
Cf. Swingletree.
Definitions
  1. The pivoted or swinging bar to which the traces of a harnessed horse are fixed; a whiffletree. ✍ When two horses draw abreast, a singletree is fixed at each end of another crosspiece, called the doubletree.

Webster 1913