Pinnacle

From BibleEncyclopedia.Net

A little wing, (Matthew 4:5; Luke 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.

pin´a-k'l (πτερύγιον, pterúgion (Mat_4:5; Luk_4:9, the Revised Version margin “wing”)):

“The pinnacle of the temple” is named as the place to which the devil took Jesus, and there tempted Him to cast Himself down. It is not known what precise elevated spot is meant, whether a part of the roof of the temple itself, or some high point in the adjacent buildings overlooking the deep ravine. It was more probably the latter.