single-tree U.S. and Austr.
= swingle-tree.
| 1847 Webster s.v., A single-tree is fixed upon each end of the double-tree when two horses draw abreast. 1858 Simmonds Dict. Trade, Single-tree, a crosspiece for fastening harness. 1890 ‘R. Boldrewood’ Miner's Right iii. 24 The old mare..moved herself square to a singletree by which her trace⁓chains were fastened. |