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 in British English. symbolnoun [ C ] A heart shape is the symbol of love. The wheel in the Indian flag is a symbol of peace. Water, a symbol of life, recurs as an image throughout her poems. âº a number, letter, or sign used in mathematics, music, science, etc.: The symbol for oxygen is O. âº An object can be described as a symbol of something else if it seems to represent it because it is connected with it in a lot of people's minds: