When two objects touch, a certain portion of their surface areas will be in contact with each other. Contact area is the fraction of this area that consists of the atoms of one object in contact with the atoms of the other object. Because objects are never perfectly flat due to asperities, the actual contact area (on a microscopic scale) is usuall...
that portion of the proximal surface of a tooth that touches the adjacent tooth.
the area in contact between two mated contacts, two conductors or a conductor and a contact, which provides an electrical path
That part of the proximal surface of a tooth which touches the adjacent tooth mesially or distally. ... Synonym: contact point, point of proximal contact. ... (05 Mar 2000) ... 
contact point proximal surface.
gas-oil or oil-water interface in a reservoir. 
Type: Term Definitions: 1. that part of the proximal surface of a tooth that touches the adjacent tooth mesially or distally. Synonyms: contact point, point of proximal contact