P.b.

1.
Baseball. passed ball; passed balls.
1.
British Pharmacopoeia.
1.
Prayer Book.

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PBA
1. Professional Bowlers Association. 2. Public Buildings Administration. 1. Patrolmen’s Benevolent Association. Professional Bowlers Association
P.B.A.
1. Patrolmen’s Benevolent Association.
PBB
Chemistry. 1. any of the highly toxic and possibly carcinogenic aromatic compounds consisting of two benzene rings in which bromine takes the place of two or more hydrogen atoms: used as a fire retardant and additive for plastics. polybrominated biphenyl