DCHP-1 Online
back tree Lumbering 
one of the trees to which a skyline is attached.
See also: skyline
- 1942 (1946) In the case of a skidder, a heavy cable [is] stretched from the spar tree out to a "back tree" at the far edge of the setting.
- 1942 (1946) In the case of a skidder, a heavy cable [is] stretched from the spar tree out to a "back tree" at the far edge of the setting.