B [1] (also b) NOUN (pl. Bs or B's) 1) the second letter of the alphabet. 2) denoting the second item in a set. 3) Music the seventh note of the diatonic scale of C major. 4) the human blood type containing the B antigen and lacking the A.
B [2] ABBREVIATION 1) (in chess) bishop. 2) black (used in describing grades of pencil lead).
SYMBOL the chemical element boron.

English terms dictionary. 2015.

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