Also found in: Encyclopedia, Wikipedia.
A secondary or intermediate rib in a rib vault that rises from one of the main springers and connects to a point on the ridge rib.
[French, from tierce, tierce; see tierce.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Architecture) architect (in Gothic architecture) a type of supporting rib on a vault
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014