Sin"gle*tree` (?), n. [Cf. Swingletree.] The pivoted or swinging bar to which the traces of a harnessed horse are fixed; a whiffletree.

&fist; When two horses draw abreast, a singletree is fixed at each end of another crosspiece, called the doubletree.

Sin"gle*tree` (?), n. [Cf. Swingletree.] The pivoted or swinging bar to which the traces of a harnessed horse are fixed; a whiffletree.

&fist; When two horses draw abreast, a singletree is fixed at each end of another crosspiece, called the doubletree.