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P, p

[pee] /pi/
noun, plural P's or Ps, p's or ps.
1.
the sixteenth letter of the English alphabet, a consonant.
2.
any spoken sound represented by the letter P or p, as in pet, supper, top, etc.
3.
something having the shape of a P .
4.
a written or printed representation of the letter P or p.
5.
a device, as a printer's type, for reproducing the letter P or p.

P

1.
Education. (as a rating of student performance) passing.
2.
Chess. pawn.
3.
Electronics. plate.
4.
poor.
5.
Grammar, predicate.

P

Symbol.
1.
the 16th in order or in a series, or, when I is omitted, the 15th.
2.
(sometimes lowercase) the medieval Roman numeral for 400.
Compare Roman numerals.
3.
Genetics. parental.
4.
Chemistry, phosphorus.
5.
Physics.
  1. power.
  2. pressure.
  3. proton.
  4. space inversion.
  5. poise 2 .
6.
Biochemistry, proline.

p1

1.
Music. softly.
Origin
< Italian piano

p2

1.
penny; pence.

P-

1.
Military. (in designations of fighter aircraft) pursuit:
P-38.

p-

1.
Chemistry, para-1 (def 2).

P.1

1.
Origin
< Latin Pater

P.2

1.
2.
3.
peso.
4.
post.
5.
6.
7.
8.

p.1

1.
Origin
< Latin pater

p.2

1.
Music. softly.
Origin
< Italian piano

p.3

1.
Origin
< Latin post

p.4

1.
page.
2.
part.
4.
past.
5.
Chess. pawn.
6.
penny; pence.
7.
per.
8.
Grammar, person.
9.
10.
peso.
11.
pint.
12.
pipe.
13.
Baseball. pitcher.
14.
pole.
15.
16.
17.
18.
purl.

Heyse

[hahy-zuh] /ˈhaɪ zə/
noun
1.
Paul (Johann von)
[poul yoh-hahn fuh n] /paʊl ˈyoʊ hɑn fən/ (Show IPA),
1830–1914, German playwright, novelist, poet, and short-story writer: Nobel Prize 1910.

rho

[roh] /roʊ/
noun, plural rhos.
1.
the 17th letter of the Greek alphabet (P, ρ).
2.
the consonant sound represented by this letter.
Origin
1350-1400; Middle English < Greek rhô
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for p

p

/piː/
noun (pl) p's, P's, Ps
1.
the 16th letter and 12th consonant of the modern English alphabet
2.
a speech sound represented by this letter, usually a voiceless bilabial stop, as in pig
3.
mind one's p's and q's, to be careful to behave correctly and use polite or suitable language

p

symbol
1.
(in Britain) penny or pence
2.
(music) piano: an instruction to play quietly
3.
pico-
4.
(physics)
  1. momentum
  2. proton
  3. pressure

P

symbol
1.
(chem) phosphorus
2.
(physics)
  1. pressure
  2. power
  3. parity
  4. poise
3.
(on road signs) parking
4.
(chess) pawn
5.
(currency)
  1. (the former) peseta
  2. peso
  3. pataca
  4. pula
abbreviation
6.
Portugal (international car registration)
7.
pharmacy only: used to label medicines that can be obtained without a prescription, but only at a shop at which there is a pharmacist

p-

prefix
1.
short for para-1 (sense 6)

p.

abbreviation
1.
(pl) pp. page
2.
part
3.
participle
4.
past
5.
per
6.
post
7.
pro
Word Origin
(sense 6) Latin: after(sense 7) Latin: in favour of; for

rho

/rəʊ/
noun (pl) rhos
1.
the 17th letter in the Greek alphabet (Ρ, ρ), a consonant transliterated as r or rh
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for p

P

a rare letter in the initial position in Germanic, in part because by Grimm's Law PIE p- became Germanic f-; even with the early Latin borrowings in Old English, -p- takes up a little over 4 pages in J.R. Clark Hall's "Concise Anglo-Saxon Dictionary," compared to 31 pages for B and more than 36 for F. But it now is the third-most-common initial letter in the English vocabulary, and with C and S comprises nearly a third of the dictionary, a testimony to the flood of words that have entered the language since 1066 from Latin, Greek, and French.

To mind one's Ps and Qs (1779), possibly is from confusion of these letters among children learning to write. Another theory traces it to old-time tavern-keepers tracking their patrons' bar tabs in pints and quarts. But cf. also to be P and Q (1610s), "to be excellent," a slang phrase said to derive from prime quality.

Online Etymology Dictionary, © 2010 Douglas Harper
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p in Medicine

P
The symbol for the element phosphorus.

p- abbr.
para- (often italic)

rho n.

Symbol ρ The 17th letter of the Greek alphabet.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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p in Science
P  
  1. The symbol for parity.

  2. The symbol for phosphorus.

  3. The symbol for power.

  4. The symbol for pressure.


phosphorus
  (fŏs'fər-əs)   
Symbol P
A highly reactive, poisonous nonmetallic element occurring naturally in phosphates, especially in the mineral apatite. It exists in white (or sometimes yellow), red, and black forms, and is an essential component of protoplasm. Phosphorus is used to make matches, fireworks, and fertilizers and to protect metal surfaces from corrosion. Atomic number 15; atomic weight 30.9738; melting point (white) 44.1°C; boiling point 280°C; specific gravity (white) 1.82; valence 3, 5. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang definitions & phrases for p

p

noun

Any of the various units of currency whose designations begin with ''p,'' such as the Mexican peso or the Vietnamese piastre (1966+)

Related Terms

pee


The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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Related Abbreviations for p

p

  1. momentum
  2. piano (musical direction)
  3. proton
  4. punctuation

P

  1. pale
  2. parental generation
  3. parity
  4. parking available
  5. pass
  6. pawn
  7. petite
  8. phosphorus
  9. poor
  10. Portugal (international vehicle ID)
  11. pressure
  12. professional (as in personal ads)
  13. punter

p.

  1. page
  2. part
  3. participle
  4. past
  5. penny
  6. peseta
  7. peso
  8. pint
  9. pipe
  10. pole
  11. population
  12. principal
  13. purl

P.

Peter

p-

para-
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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Idioms and Phrases with p
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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