b1
/biː
/abbreviation
1 Physics Barn(s).
2 (b.) Born (used to indicate a date of birth): George Lloyd (b.1913)
3 Cricket (On scorecards) bowled by: AC Hudson b Prasad 146
4 Cricket (On scorecards) bye(s): extras (b 6, lb 24, nb 9) 39
B2
/biː/(also b)
noun (plural Bs or B's)
1The second letter of the alphabet.
1.1Denoting the second in a set of items, categories, sizes, etc.
1.2The second highest class of academic mark: my grade on that first paper was a B
1.3(In the UK) denoting a secondary road: the B4248 B-roads
1.4Denoting the second-highest-earning socio-economic category for marketing purposes, including intermediate management and professional personnel.
1.5 (b) Chess Denoting the second file from the left, as viewed from White’s side of the board.
1.6 (usually b) The second fixed constant to appear in an algebraic equation.
1.7 Geology Denoting a soil horizon of intermediate depth, typically the subsoil.
1.8The human blood type (in the ABO system) containing the B antigen and lacking the A.
1.9(With numeral) denoting a series of international standard paper sizes each twice the area of the next, as B0, B1, B2, B3, B4, etc., B4 being 250 × 353 mm.
2 (usually B) Music The seventh note of the diatonic scale of C major.
2.1A key based on a scale with B as its keynote.
Phrases
plan B
B3
/biː/abbreviation
1Belgium (international vehicle registration).
2Bishop (used in recording moves in chess): Be5
3Black (used in describing grades of pencil lead): 2B pencils
4Bomber (in designations of US aircraft types): a B-52
symbol
1The chemical element boron.
2 Physics Magnetic flux density.