- 1. informal abbreviation for "billion," generally meaning the American billion 109. This abbreviation is non-metric: the metric abbreviation for 109 is G, standing for the prefix giga-. The B form has been used in such units as Bcf (billion cubic feet) and BeV (billion electron volts).2. a symbol for international standard paper sizes, followed by the size number,as in B4. A table of sizes is provided.A sheet of size B <VAR>n</VAR> has a width of 100·2-<VAR>n</VAR>/2 centimetersand a length of 100·21/2-<VAR>n</VAR>/2 centimeters(rounded to the nearest millimeter).3. see byte4. see Bubnoff unit5. see brewster6. see bel
Dictionary of units of measurement. 2015.