back-tilt Lab. 
n. See 1792 quote.
See also: tilt tilt-back
- 1770 (1792) The wind coming to the eastward, we . . . constructed a back-tilt near the brook.
- 1792 A Black-tilt is a shed made of boughs, resembling the section of a roof; the back part is placed towards the wind, and a fire is generally made in the front.