Surface

a surface or also a cross section or a cross-section area is:

• a range expanded flat after length and width.

  A surface a part of one level expanded in two dimensions is geometrical, as it is described in Euclidean geometry.

  In the SI-UNIT system is A (from English.: AREA) the symbol of the area. The use of the F as symbols became outdated. The basic unit is the square meter (m ²). For further square measures see there.

• In the mathematical subsections of the Differentialgeometrie and topologycalls one a two-dimensional diversity surface. In particular such a surface can be also curved. See: Surface (topology).
• the smooth (flatten) exterior of a body/an article, thus the surfaces of an object.

  Then a surface can be also curved. Example: Crystal face, Boundary surface, earth's surface.

• A computing surface, see reference surface.

Wiktionary: Surface - word origin, synonyms and translations

this side is a term clarifying for the distinction of several terms named the same word.