Roofing Terms & Definitions. Asphalt: A bituminous waterproofing agent applied to roofing materials during manufacturing. Back Surfacing: Fine mineral matter applied to the backside of shingles to keep them from. sticking. Blisters: Bubbles that may appear on the surface of asphalt roofing after installation.
Symbol(noun) an abbreviation standing for the name of an element and consisting of the initial letter of the Latin or New Latin name, or sometimes of the initial letter with a following one; as, C for carbon, Na for sodium (Natrium), Fe for iron (Ferrum), Sn for tin (Stannum), Sb for antimony (Stibium), etc.
symbol-Computer Definition. 1  A sign that has a specific meaning in a specific context, such as mathematics. 2  For example, the Greek letter (lambda) is used in physics to mean wavelength, which is the inverse of frequency, represented by the Latin letter f.ymbol-Computer Definition. 1  A sign that has a specific meaning in a specific context, such as mathematics. 2  Something that represents or suggests something else, usually something abstract. 3  In digital communications, the smallest amount of data transmitted at one time.