Interfacial
Part of speech: adjective
Definition: Of or pertaining to an interface
Surface
Part of speech: noun
Definition: The up-side of a flat object such as a table.The outside hull of a tangible object.The locus of an equation (especially one with exactly two degrees of freedom) in a more-than-two-dimensional space.
Part of speech: verb
Definition: To provide something with a surface.To apply a surface to something.To rise to the surface.To come out of hiding.For information or facts to become known.To work a mine near the surface.
Example sentence: Work is of two kinds: first, altering the position of matter at or near the earth's surface relative to other matter; second, telling other people to do so.