pH is a measure of acidity or alkalinity. PH, ph, pH, and Ph may also refer to: *

Philippines The Philippines, officially the Republic of the Philippines, is an Archipelagic state, archipelagic country in Southeast Asia. Located in the western Pacific Ocean, it consists of List of islands of the Philippines, 7,641 islands, with a tot ...

(ISO country code PH), a country located in Southeast Asia

Arts and media

* PistonHeads, a motoring website and forum * PH (band), formerly known as Mr. Peter Hayden, a Finnish band *

Pornhub Pornhub is a Canadian-owned Internet pornography video-sharing website, one of several owned by adult entertainment conglomerate Aylo. , Pornhub is the 16th- most-visited website in the world and the most-visited adult website. The site al ...

, a pornographic video sharing website *

Production house Production may refer to: Economics and business * Production (economics) * Production, the act of manufacturing goods * Production, in the outline of industrial organization, the act of making products (goods and services) * Production as a stati ...

Aviation

* Prefix for the Netherlands; see

List of aircraft registration prefixes This is a list of aircraft registration prefixes used by civil aircraft. Post-1928 allocations Current allocations The 1928 prefixes have been amended and added to over the years, with the current markings being: Retired allocations Some p ...

* IATA airline designator for Polynesian Airlines; see List of airline codes (P) *

Transavia Denmark Transavia Denmark ApS, also known as Transavia.com Denmark or Transavia Denmark and trading as transavia.com, was a Denmark, Danish based low-cost airline operating as a subsidiary of Transavia group. Its main base was at Copenhagen Airport. Tran ...

(IATA: PH)

Companies and organizations

Parker-Hannifin Parker-Hannifin Corporation, originally Parker Appliance Company, usually referred to as just Parker, is an American corporation specializing in motion and control technologies. Its corporate headquarters are in Mayfield Heights, Ohio, in Greater ...

Corporation (stock ticker PH) *

Pakatan Harapan Pakatan Harapan (PH; stylised as HARAPAN; ) is a Malaysian Parliamentary group, political coalition consisting of Centre-left politics, centre-left political parties which was formed in 2015 to succeed the Pakatan Rakyat coalition. It has led ...

(also known as "Alliance of Hope"), a political coalition in Malaysia *

Pizza Hut Pizza Hut, LLC is an American multinational pizza restaurant chain and international franchise founded in 1958 in Wichita, Kansas, by brothers Dan and Frank Carney. The chain, headquartered in Plano, Texas, operates 19,866 restaurants worldw ...

, a pizza restaurant chain

Places

Port Harcourt Port Harcourt (Pidgin: ''Po-ta-kot or Pi-ta-kwa)'' is the capital and largest city of Rivers State in Nigeria. It is the fifth most populous city in Nigeria after Lagos, Kano, Ibadan and Benin. It lies along the Bonny River and is locate ...

, (alternative name of the city) *

Preston Hollow, Dallas Preston Hollow is a neighborhood in North Dallas, Texas. It is bordered on the south by the city of University Park. History Beginning in the 1850s, the first settlers began receiving land grants for Preston Hollow’s land. Among them were ...

, a neighborhood *

PH postcode area The PH postcode area, also known as the Perth postcode area, is a group of 43 postcode districts for post towns: Aberfeldy, Acharacle, Arisaig, Auchterarder, Aviemore, Ballachulish, Blairgowrie, Boat of Garten, Carrbridge, Corrour, Crieff, Da ...

, postcode area in Scotland

Science and technology

Chemistry

Phenyl group In organic chemistry, the phenyl group, or phenyl ring, is a cyclic group of atoms with the formula , and is often represented by the symbol Ph (archaically φ) or Ø. The phenyl group is closely related to benzene and can be viewed as a benzene ...

, either -Ph or Φ, highly-stable and aromatic hydrocarbon unit found in many organic compounds *

Pleckstrin homology Pleckstrin homology domain (PH domain) or (PHIP) is a protein domain of approximately 120 amino acids that occurs in a wide range of proteins involved in intracellular signaling or as constituents of the cytoskeleton. This domain can bind phosph ...

domain, a part of many proteins which bind phosphoinositides with high affinity

Computing

* .ph, the Philippines' Internet country code top-level domain * Ph protocol, an early web database search for

CCSO Nameserver A CCSO name-server or Ph protocol was an early form of database search on the Internet. In its most common form, it was used to look up information such as telephone numbers and email addresses. Today, this service has been largely replaced by LDAP ...

described by RFC 2378 *

PH (complexity) In computational complexity theory, the polynomial hierarchy (sometimes called the polynomial-time hierarchy) is a hierarchy of complexity classes that generalize the classes NP and co-NP. Each class in the hierarchy is contained within PSPACE. ...

, the union of all complexity classes in the polynomial hierarchy in computational complexity theory

Physics

Phot A phot (ph) is a photometric unit of illuminance, or luminous flux through an area. It is not an SI unit but rather is associated with the older centimetre–gram–second system of units. The name was coined by André Blondel in 1921.Parry Moo ...

, or ph, a measurement of illuminance, in photometry * Picohenry, an SI Unit of electrical inductance

Other sciences

Planet Hunters Planet Hunters is a citizen science project to find exoplanets using human eyes. It does this by having users analyze data from the NASA Kepler space telescope and the NASA Transiting Exoplanet Survey Satellite. It was launched by a team led by D ...

, a group that hunts for exoplanets *

Precipitation hardening Precipitation hardening, also called age hardening or particle hardening, is a heat treatment technique used to increase the yield strength of malleable materials, including most structural alloys of aluminium, magnesium, nickel, titanium, and so ...

, a heat treatment technique used to increase the yield strength of malleable materials *

Pulmonary hypertension Pulmonary hypertension (PH or PHTN) is a condition of increased blood pressure in the pulmonary artery, arteries of the lungs. Symptoms include dypsnea, shortness of breath, Syncope (medicine), fainting, tiredness, chest pain, pedal edema, swell ...

, a medical condition

Other uses

* pʰ, a phoneme *

Ph (digraph) This is a list of digraphs used in various Latin alphabets. In the list, letters with diacritics are arranged in alphabetical order according to their base, e.g. is alphabetised with , not at the end of the alphabet, as it would be in Danish, ...

, a common digraph that represents the phoneme /f/ (voiceless labiodental fricative) in phonetics * PH, abbreviation for

professional hunter A professional hunter (less frequently referred to as market or commercial hunter and regionally, especially in Britain and Ireland, as professional stalker or gamekeeper) is a person who Hunting, hunts and/or manages Game (hunting), game by profe ...

used in East and Southern Africa * (ph), a notation used in transcripts to indicate that the transcriber does not know the spelling, usually of a name, and has spelled it as it was pronounced (

phonetic Phonetics is a branch of linguistics that studies how humans produce and perceive sounds or, in the case of sign languages, the equivalent aspects of sign. Linguists who specialize in studying the physical properties of speech are phoneticians ...

ally) * ''pH Care'', a feminine hygiene brand in the Philippines owned by UL Skin Sciences, Inc., a subsidiary of

Unilab Unilab, Inc., commonly known as Unilab (stylized in all caps), is a Philippine pharmaceutical company headquartered in Mandaluyong, Metro Manila. It specializes in a wide range of consumer healthcare products such as prescription and over-the ...

PH (footballer) Philippe Guimarães (born 18 March 1991), commonly known as PH, is a Brazilian footballer who plays as a defensive midfielder In the sport of association football, a midfielder takes an outfield position primarily in the middle of the pitc ...

(born 1991), Brazilian footballer Philippe Guimarães *

Poul Henningsen Poul Henningsen (9 September 1894 – 31 January 1967) was a Danish author, critic, architect, and designer. In Denmark, where he often is referred to simply as PH, he was one of the leading figures of the cultural life of Denmark between the Wor ...

(1894–1967), Danish writer and designer known in Denmark as PH *

Professional hunter A professional hunter (less frequently referred to as market or commercial hunter and regionally, especially in Britain and Ireland, as professional stalker or gamekeeper) is a person who Hunting, hunts and/or manages Game (hunting), game by profe ...

Public house A pub (short for public house) is in several countries a drinking establishment licensed to serve alcoholic drinks for consumption Licensing laws of the United Kingdom#On-licence, on the premises. The term first appeared in England in the ...

, most commonly referred to as ''pub'', an establishment licensed to serve alcoholic drinks *

Purple Heart The Purple Heart (PH) is a United States military decoration awarded in the name of the president to those wounded or killed while serving, on or after 5 April 1917, with the U.S. military. With its forerunner, the Badge of Military Merit, ...

, a US military award, in post-nominal designation *

Pinch hitter In baseball, a pinch hitter (PH) is a substitute batter. Batters can be substituted at any time while the ball is dead (not in active play); the manager may use any player who has not yet entered the game as a substitute. Unlike basketball, A ...

, in baseball * abbreviation used to denote the English

regnal years A regnal year is a year of the reign of a sovereign, from the Latin meaning kingdom, rule. Regnal years considered the date as an ordinal, not a cardinal number. For example, a monarch could have a first year of rule, a second year of rule, a t ...

Philip II of Spain Philip II (21 May 152713 September 1598), sometimes known in Spain as Philip the Prudent (), was King of Spain from 1556, King of Portugal from 1580, and King of Naples and List of Sicilian monarchs, Sicily from 1554 until his death in 1598. He ...

* P^ḥ, abbreviation (e.g. on maps) for

parish A parish is a territorial entity in many Christianity, Christian denominations, constituting a division within a diocese. A parish is under the pastoral care and clerical jurisdiction of a priest#Christianity, priest, often termed a parish pries ...

, also in the meaning of

civil parish In England, a civil parish is a type of administrative parish used for local government. It is a territorial designation which is the lowest tier of local government. Civil parishes can trace their origin to the ancient system of parishes, w ...

* Phillips, a type of cross-head screw drive bits * ⲣⲏ, Coptic for the Egyptian deity Ra *

Patrouilleurs Hauturiers Patrouilleurs Hauturiers (English: Offshore Patrol Vessel), often shortened to PH, is a program to design and build 10 long-range patrol boats for the French Navy. Formerly known as the Patrouilleurs Océanique (PO) program, the ships will replace ...

program of the French Navy