denture base
n.
The part of a denture that rests on the oral mucus membrane and to which teeth are attached.
The part of a complete or partial denture that rests on the denture foundation and to which teeth are attached.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.