Easton's Bible Dictionary: M. G. Easton, M.A., D.D.
A little wing, (Mt. 4:5; Lk. 4:9
). On the southern side of the temple court was a range of porches or cloisters forming three arcades. At the south-eastern corner the roof of this cloister was some 300 feet above the Kidron valley. The pinnacle, some parapet or wing-like projection, was above this roof, and hence at a great height, probably 350 feet or more above the valley.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.