WordReference Random House Unabridged Dictionary of American English © 2026
PB, 
  1. Automotivepower brakes.

Pb, [Symbol, Chem.]
  1. lead.
  • Latin plumbum

P.B., 
    1. British Pharmacopoeia.
      • Latin Pharmacopoeia Britannica
    2. ReligionPrayer Book.

p.b., [Baseball.]
  1. Sportpassed ball;
    passed balls.

Collins Concise English Dictionary © HarperCollins Publishers::
PB
  1. personal best
Collins Concise English Dictionary © HarperCollins Publishers::
Pb
  1. lead
Etymology: from New Latin plumbum
'PB' also found in these entries (note: many are not synonyms or translations):
basic - boulangerite - curite - lead - lead acetate - lead azide - mimetite - naumannite - phosgenite - pyromorphite - red lead - tetraethyl lead - tetraethyllead - tetramethyllead - vanadinite - white lead - zinkenite

Forum discussions with the word(s) "PB" in the title:


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