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pa

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pa

[pah, paw]
–noun Informal.
father.

Origin:
short for papa

PA

1. Parents' Association.
2. paying agent.
3. Pennsylvania (approved esp. for use with zip code).
4. physician's assistant.
5. press agent.
6. public-address system.

Pa

Physics.
pascal; pascals.

Pa

Symbol, Chemistry.
protactinium.

Pa.

P.A.

1. Parents' Association.
2. Insurance. particular average.
3. passenger agent.
4. post adjutant.
5. power of attorney.
6. press agent.
7. public-address system.
8. publicity agent.
9. purchasing agent.

p.a.

1. participial adjective.
2. per annum.
3. press agent.

p.-a.

public-address system.

particular average

–noun Marine Insurance.
a loss at sea, as through accident or negligence, that is borne solely by the owner of the lost property. Abbreviation: P.A.
Also called particular average loss.


Origin:
1765–75

pas⋅cal

[pa-skal, pah-skahl]
–noun Physics.
the SI unit of pressure or stress, equal to one newton per square meter. Abbreviation: Pa

Origin:
1955–60; after Pascal

Penn⋅syl⋅va⋅nia

[pen-suhl-veyn-yuh, -vey-nee-uh]
–noun
a state in the E United States. 11,886,728; 45,333 sq. mi. (117,410 sq. km). Capital: Harrisburg. Abbreviation: PA (for use with zip code), Pa., Penn., Penna.

physician's assistant

–noun
a person trained to perform under the supervision of a physician many clinical procedures traditionally performed by a physician, as diagnosing and treating minor ailments. Abbreviation: PA
Also, physician assistant.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To pa
pa   (pä)   
n.   Informal
Father; papa.

[Short for papa.]
Pa 1  
The symbol for the element protactinium.
Pa 2  
abbr.  pascal
PA  
abbr.  
  1. or Pa. Pennsylvania

  2. physician's assistant

  3. or P/A power of attorney

  4. press agent

  5. production assistant

  6. prosecuting attorney

  7. public-address system

pas·cal   (pā-skāl', pä-skäl')   
n.  
  1. Abbr. Pa A unit of pressure equal to one newton per square meter.

  2. Pascal A high-level programming language designed to support structured programming and used in teaching, applications, and systems programming.


[After Blaise Pascal.]
Penn·syl·va·nia   (pěn'səl-vān'yə, -vā'nē-ə)   
A state of the eastern United States. It was admitted as one of the original Thirteen Colonies in 1787. Explored by Europeans in the early 1600s, the region was settled by Swedes in 1634 and granted by royal charter to William Penn in 1681. The Mason-Dixon Line (surveyed in 1763-1767) established the southern boundary of the colony and was extended westward in 1784. Pennsylvania played a crucial role in the American Revolution and in the formation of the new republic. Harrisburg is the capital, and Philadelphia is the largest city. Population: 12,400,000.
physician assistant also phy·si·cian's assistant   (fĭ-zĭsh'ənz)
n.   pl. physician assistants also physicians' assistants Abbr. PA
A person trained to provide basic medical services, usually under the supervision of a physician.
power of attorney  
n.   pl. powers of attorney Abbr. PA or P/A
A legal instrument authorizing one to act as another's attorney or agent.
pros·e·cut·ing attorney   (prŏs'ĭ-kyōō'tĭng)
n.   Abbr. PA or Pros. Atty.
A lawyer empowered to prosecute cases on behalf of a government and its people. Also called prosecution, prosecutor.
pro·tac·tin·i·um   (prō'tāk-tĭn'ē-əm)   
n.   Symbol Pa
A rare, extremely toxic, radioactive element chemically similar to uranium, having 13 known isotopes, the most common of which is protactinium 231 with a half-life of 32,480 years. Atomic number 91; melting point 1,230°C; specific gravity 15.37; valence 4, 5. See Table at element.

[prot(o)- + actinium (so called because it decays into actinium).]
pub·lic-ad·dress system   (pŭb'lĭk-ə-drěs')
n.   Abbr. PA
An electronic amplification apparatus installed and used for broadcasting in public areas.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Cultural Dictionary

Pennsylvania

State in the northeastern United States bordered by Lake Erie and New York to the north; New Jersey to the east; Delaware, Maryland, and West Virginia to the south; and Ohio to the west. Its capital is Harrisburg, and its largest city is Philadelphia.

Note: One of the thirteen colonies.
Note: Named after the father of William Penn, a devout Quaker, who was granted proprietary rights by the king of England to almost the whole of what is now Pennsylvania in the late seventeenth century.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

pa 
1811, colloquial shortening of papa (q.v.).

PASCAL 
high-level computer programming language, 1971, named for Fr. scholar Blaise Pascal (1623-62), who invented a calculating machine c.1642.

Pennsylvania 
American colony, later U.S. state, 1681, lit. "Penn's Woods," a hybrid formed from the surname Penn (Welsh, lit. "head") + L. sylvania (see sylvan). Not named for William Penn, the proprietor, but, on suggestion of Charles II, for Penn's late father, Admiral William Penn (1621-70), who had lent the king the money that was repaid in the form of land for a Quaker settlement in America. Penn wanted to call it New Wales, but the king's secretary, a Welshman of orthodox religion, wouldn't hear of it. Pennsylvania Dutch is attested from 1824. Pennsylvanian in ref. to a geological system is attested from 1891.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: Pa
Function: symbol
protactinium

Main Entry: PA
Pronunciation: "pE-'A
Function: noun
: PHYSICIAN'SASSISTANT

Main Entry: PA
Function: abbreviation
pernicious anemia

Main Entry: pas·cal
Pronunciation: pas-'kal
Function: noun
: a unit of pressure in the mks system equivalent to one newton per square meter or to 1.45× 104 pounds per square inch
Pasácal /pos-kol/, Blaise (1623–1662), French mathematician, physicist, and religiousphilosopher. A mathematical prodigy as a child, Pascal completed an original treatise on conic sections by the time he was 16. He undertook the study of geometry, hydrodynamics, and hydrostatic andatmospheric pressure. From 1651 to 1654 he composed treatises on the weight and density of air, on Pascal's triangle, and on the equilibrium of liquid solutions. In this last treatise he formulatedPascal's law of pressure. He is also credited with laying the foundations for the theory of probability. Pascal is a major figure in French literature and religious philosophy.

Main Entry: physician's as·sis·tant
Pronunciation: -&-'sis-t&nt
Variant: or physician assistant
Function: noun
: aspecially trained person who is certified to provide basic medical services (as the diagnosis and treatment of common ailments) usually under the supervision of a licensed physician called alsoPA
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

Pa
The symbol for the element protactinium.

PA or P.A.
abbr.
physician's assistant

pascal pas·cal (pā-skāl', pä-skäl')
n.
A unit of pressure equal to one newton per square meter.

physician's assistant phy·si·cian's assistant (fĭ-zĭsh'ənz)
n. pl. physicians' assistants

Abbr. PA, P.A. A person trained and licensed to provide basic medical services, usually under the supervision of a physician.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
Pa  
  1. Abbreviation of pascal

  2. The symbol for protactinium.


Pascal, Blaise 1623-1662.  
French mathematician, physicist, and philosopher who, with Pierre de Fermat, developed the mathematical theory of probability. He also contributed to the development of differential calculus, and he invented the mechanical calculator and the syringe. The pascal unit of pressure is named after him.
protactinium   (prō'tāk-tĭn'ē-əm)  Pronunciation Key 
Symbol Pa
A rare, extremely toxic, radioactive metallic element of the actinide series that occurs in uranium ores. It has 13 known isotopes, the most stable of which is protactinium 231 with a half-life of 32,760 years. Atomic number 91; approximate melting point 1,550°C; specific gravity 15.37; valence 4, 5. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Computing Dictionary

pa networking
The country code for Panama.
(1999-01-27)

The Free On-line Dictionary of Computing, © 1993-2007 Denis Howe
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Abbreviations & Acronyms
pa
  1. pulmonary artery

  2. Punjabi

Pa
  1. pascal

  2. protactinium

PA
  1. Palestinian Authority

  2. Panama (international vehicle ID)

  3. Pennsylvania

  4. physician's assistant

  5. plate appearances (baseball)

  6. power of attorney

  7. press agent

  8. professional association

  9. prosecuting attorney

  10. public-address system

  11. public affairs

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