pendentive

詳細解釋：

pen.den.tive

n.Architecture （名詞）【建築學】
A triangular section of vaulting between the rim of a dome and each adjacent pair of the arches that support it.
弧三角拱，方牆四角圓穹頂支承拱：拱形結構的三角形部分，位於頂穹邊緣和每對支撐此拱形結構的相鄰圓拱之間

來源：
French pendentif
法文 pendentif
from Latin pendôns pendent- [hanging] [present participle of] pendôre [to hang] * see (s)pen-
源自 拉丁語 pendôns pendent- [懸掛的] [] pendôre的現在分詞 [懸掛] *參見 (s)pen-