Dictionary of Meaning
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P
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{{AZ|uc=P|lc=p}}'''P''' is the sixteenth letter of the
Latin alphabet. Its name in
English language English is ''pee''.
Semitic Pê (mouth) as well as Greek Π or π (
Pi (letter) Pi) and the Etruscan and Latin letters that developed from the former alphabet all symbolized /p/, a plosive, unvoiced
consonant. Those who speak Arabic usually have difficulty pronouncing this sound; they pronounce it like
b instead.
Phonetic use
In
English language English and most other European languages, P is a
voiceless bilabial plosive ({{IPA.html">International Phonetic Alphabet
Phi ( φ ) in loanwords from
Greek.html"_title="Meaning of f/}},_and is commonly used to transliterate Greek">Greek_language IPA). A common digraph in English is "ph", which represents the
voiceless labiodental fricative {{IPA.html" title="Meaning of IPA.html" title="Meaning of /p/}} in the
IPA). A common digraph in English is "ph", which represents the
voiceless labiodental fricative {{IPA">Greek. Both initial and final P can be combined with many other discrete consonants in English words. A common example of
Assimilation (linguistics) assimilation is the tendency of prefixes ending in N to become M before P (such as "in" + "pulse" → "impulse" — see also
List of Latin words with English derivatives).
In German, the digraph "pf" is common, representing a labial
affricate of {{IPA|/p/}} and {{IPA|/f/}}.
Codes for computing
{{Letter
|NATO=Papa
|Morse=·– –·
|B1=â—?
|B2=â—?
|B3=â—?
|B4=â—?
|B5=â—‹
|B6=â—‹
}}
In
Unicode the
majuscule capital P is codepoint U+0050 and the
minuscule lowercase p is U+0070.
The
ASCII code for capital P is 80 and for lowercase p is 112; or in
Binary numeral system binary 01010000 and 01110000, correspondingly.
The
EBCDIC code for capital P is 215 and for lowercase p is 151.
The
numeric character references in
HTML and
XML are "
P" and "
p" for upper and lower case respectively.
Meanings for P
* In
astronomy,
** P stands for the planet
Pluto; for example,
S/2005 P 1 is the first satellite of Pluto sighted in 2005.
** P stands for periodic (comet), as in
1P/Halley or
173P/Mueller.
** P stands for an August 1 through 15 discovery, in the
provisional designation of a comet (e.g.
C/1957 P1, Comet Mrkos) or asteroid (e.g.
(4034) 1986 PA).
* In
baseball, P is the abbreviation for the position of
pitcher.
* In
bibliography, p (or p.) is the abbreviation for
page (pp. stands for "pages").
* In
biochemistry, P is the symbol for
proline.
* In
chemistry, P is the symbol for the element
phosphorus, or sometimes for
phosphate.
* In
chess, P is sometimes used as a notation symbol for the
Pawn_(chess) pawn piece
* In
computer science,
** P is an operation on a
Semaphore (programming) semaphore, used for process synchronisation.
** In
computational complexity theory complexity theory, '''
P (complexity) P''' is the set of
decision problems solvable in polynomial time on a deterministic
Turing machine
* In
computing,
<p> is the
HTML element HTML tag to mark the beginning of paragraphs.
* In
driving a
motor vehicle, P designates the parking gear of an
automatic transmission.
* In
economics, P is usually used to represent
price levels.
* In
electronics, a
p-type semiconductor p type (or p-type) semiconductor has been doped in order to increase the number of positive (hence the p) charge carriers.
* In
list of international license plate codes international licence plate codes, P stands for
Portugal.
* In
mathematics,
blackboard bold represents the set of all
prime numbers, while ''p'' is usually a variable representing a single arbitrary prime number.
* In
metrology,
** P is the symbol for the French
foot (unit of length) foot (''pied'');
** p is the symbol for the French
inch (''pouce''); and
** p can also stand for "part", as in ppm ("parts per million").
* In
music, p stands for
piano, meaning "softly" (pp stands for "
pianissimo").
* In
New Zealand P is slang for pure
methamphetamine.
* In
photography, most SLR cameras use P to signify program mode, where the camera sets both aperture and shutter speed.
* In
physics,
** ''p'' is the symbol for
momentum or
pressure
** ''P'' is the symbol for
power (physics) power or
polarisation;
** P is the symbol for the
poise, the CGS unit of dynamic viscosity;
** p is the symbol for the
poncelet, an obsolete unit of power; and
** p is the symbol for the
kilopond pond, an obsolete unit of force.
** In
particle physics, p is the symbol for the
proton.
* As the first letter of a
postal code,
** In
Canada, P stands for
Northern Ontario.
* In
probability and
statistics,
** ''p'' denotes probability
** the
P-value ''p''-value of a given result in an experiment is the result's
statistical significance significance; that is, the probability of observing this result or a more extreme result, by chance alone.
* In
publishing, a circled P, {{polytonic|Ⓟ}}, represents a copyright on a sound recording.
* In
Roman naming convention, P is the abbreviation for the
praenomen Publius.
* In the
SI system,
** p,
pico, is an
SI prefix meaning 10
-12
** P,
peta, is an SI prefix meaning 10
15
* In
symbolic logic, ''p'' is often used to denote a ''
proposition'' as well as ''q'' and ''r''.
* In the history of the
Aboriginese P was used as a symbol of discontent.
* In the
United Kingdom,
** In British
coinage, p is the symbol for
penny (plural
pence), for example 25p (25 pence).
** In
Regulation of therapeutic goods 'P' designates Pharmacist-only
Over-the-counter substance Over the counter medications.
* In Windows, Ctrl-P, and Mac OS, Command-P, prints the open document.
See also
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