| foundation | A base; a supporting structure. (05 Mar 2000) |
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| foundations | Organizations established by endowments with provision for future maintenance. (12 Dec 1998) |
| mean foundation plane | The mean of the various irregularities in form and inclination of the basal seat; the ideal condition for denture stability exists when the mean foundation plane is most nearly at right angles to the direction of force. (05 Mar 2000) |
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| National Science Foundation | <organisation> A nonregulatory U.S. Federal agency which has oversight of biotechnology research activities that the agency funds. (09 Oct 1997) |
| denture foundation | That portion of the oral structures which is available to support a denture. See: denture foundation area, denture foundation surface, mean foundation plane. (05 Mar 2000) |
| denture foundation area | That portion of the basal seat which supports the complete or partial denture base under occlusal load. Synonym: basal seat, denture-bearing area, denture-supporting area, stress-bearing area, supporting area, tissue-bearing area. (05 Mar 2000) |
| denture foundation surface | That portion of the surface of a denture which has its contour determined by the impression and bears the greater part of the occlusal load. Synonym: denture basal surface. (05 Mar 2000) |