pendentive

Etymology
From.

Noun

 * 1)  The concave triangular sections of vaulting that provide the transition between a dome and the square base on which it is set and transfer the weight of the dome.

Translations

 * Catalan:
 * French:
 * Galician:
 * German:, Eckzwickel
 * Italian:
 * Portuguese:
 * Spanish: