A three-sided, curved section of vaulting between the rim of a dome and each adjacent pair of the arches that support it.
[French pendentif, from Latin pendēns, pendent-, hanging, present participle of pendēre, to hang; see (s)pen- in the Appendix of Indo-European roots.]
(click for a larger image)pendentive
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.