B

   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 100·2^1/2-<VAR>ⁿ</VAR>^/2 centimeters(rounded to the nearest millimeter).

   3. see byte

   4. see Bubnoff unit

   5. see brewster

   6. see bel