Definitions for "Surfaces"
Keywords:  obverse, reverse, coin, entire, field
The entire obverse and reverse of a coin, although often used to mean just the field areas.
The entire obverse and reverse faces of a coin.
M-Mesial, D-Distal, O-Occlusal, L-Lingual, B-Buccal, for anterior teeth I-Incisal, F-Facial.
Keywords:  stylus, din, radius, nominal, geometric
According to DIN 4760: The effective surface is the surface which separates the object from its surrounding medium. The actual surface is the approximate image from measuring technology of the ideal geometric surface. Note: various measuring processes or measuring conditions (e.g. stylus radius) can give differing actual surfaces. The geometric surface is an ideal surface whose nominal form is defined by a drawing or other technical documentation.
A surface is a way of modelling space that attempts to treat it as continuous rather than sub-dividing it into discrete features such as polygons. Surfaces are usually modelled either as raster data or digital terrain models.
Sounds not only travel to a pair of ears on a direct path, but they also bounce off objects in the world. Most natural listening environments contain at least a sound reflecting ground plane, such as a floor. Therefore, reflecting objects are necessary to make virtual environments sound natural and realistic. They help listeners navigate and enhance the overall effect of immersion in a virtual environment. Almost as important as reflections, is the absence of a reflection. For example, the brain can tell the change in a sound space when a reflection is removed by opening a door or a window.
Keywords:  glossy, matte, paper
F surface paper is a glossy paper while N surface is a matte surfaced paper.
multiple boundary areas that comprise a part