PB

Dictionary.com Unabridged

PB

Symbol, Computers.

Pb

Symbol, Chemistry.

Origin:
< Latin plumbum

P.B.

1
British Pharmacopoeia.

Origin:
< Latin Pharmacopoeia Britannica

P.B.

2
Prayer Book.

p.b.

Baseball. passed ball; passed balls.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
Pb
 
the chemical symbol for
lead
 
[from New Latin plumbum]

PB
 
abbreviation for
1.  Pharmacopoeia Britannica
2.  Prayer Book
3.  athletics personal best

Collins English Dictionary - Complete & Unabridged 10th Edition
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Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

Pb
The symbol for the element lead2.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
Pb  
The symbol for lead.
lead   (lěd)  Pronunciation Key 
Symbol Pb
A soft, ductile, heavy, bluish-gray metallic element that is extracted chiefly from galena. It is very durable and resistant to corrosion and is a poor conductor of electricity. Lead is used to make radiation shielding and containers for corrosive substances. It was once commonly used in pipes, solder, roofing, paint, and antiknock compounds in gasoline, but its use in these products has been curtailed because of its toxicity. Atomic number 82; atomic weight 207.2; melting point 327.5°C; boiling point 1,744°C; specific gravity 11.35; valence 2, 4. See Periodic Table. See Note at element.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Abbreviations & Acronyms
pb
paperback [book]
Pb
lead
PB
  1. paperback [book]

  2. passbook

  3. peanut butter

  4. petabyte

  5. prayer book

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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