P

P is the 16th letter of the Latin alphabet.

Semitic Pê (mouth) as well as Greek Π or π (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 like b instead.

Papa represents the letter P in the NATO phonetic alphabet.

Meanings for P

In baseball, P is the abbreviation for the position of pitcher.
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 piece
In computer science,
- P is an operation on a semaphore, used for process synchronisation.
- In complexity theory, P is the set of decision problems solvable in polynomial time on a deterministic Turing machine; see Complexity classes P and NP.
- <P> is the HTML tag for paragraphs.
Amongst drug users P is slang for pure methamphetamine.
In international licence plate codes, P stands for Portugal.
In mathematics, blackboard bold represents the prime numbers
In the Metric system,
- p, Pico, is an SI prefix meaning 10^-12.
- P, Peta, is an SI prefix meaning 10¹⁵
- p is the symbol for the pond, a now obsolete unit of force; see kilopond.
In British coinage, it is the symbol for penny (pl. pence). i.e. 25p (25 pence).
In physics,
- p is the symbol for momentum or pressure
- P is the symbol power or polarisation;
- In particle physics, p is the symbol for the proton.
In probability and statistics,
- p denotes probability
- the p-value of a given result in an experiment the is result's significance; that is, the probability of observing this result or a more extreme result, by chance alone.
In publishing, a circled P, Ⓟ, represents a copyright on a sound recording.
In symbolic logic, p is often used to denote a proposition as well as q and r.

Two-letter combinations starting with P:

pa pb pc pd pe pf pg ph pi pj pk pl pm pn po pp pq pr ps pt pu pv pw px py pz