Pronunciation: (pen-den'tiv),[key] —n.Archit. 1. any of several spandrels, in the form of spherical triangles, forming a transition between the circular plan of a dome and the polygonal plan of the supporting masonry.
2. any of several masonry devices, as squinches or trompes, for forming a transition between a circular or polygonal construction, as a dome or lantern, and supporting masonry of a different plan.
—adj. functioning as, or substituting for, a pendentive: pendentive corbeling.