pH is a measure of acidity or alkalinity.

PH, ph, pH, and Ph may also refer to:

Arts and media

  • PistonHeads, a motoring website and forum
  • PH (band), formerly known as Mr. Peter Hayden, a Finnish band
  • Pornhub, a pornographic video sharing website
  • Production house

Aviation

  • Prefix for the Netherlands; see List of aircraft registration prefixes
  • IATA airline designator for Polynesian Airlines; see List of airline codes (P)
  • Transavia Denmark (IATA: PH)

Companies and organizations

  • Parker-Hannifin Corporation (stock ticker PH)
  • Pakatan Harapan (also known as "Alliance of Hope"), a political coalition in Malaysia
  • Pizza Hut, a pizza restaurant chain

Places

  • Philippines (ISO 3166-2 country code PH), a country located in Southeast Asia
  • Port Harcourt, (alternative name of the city)
  • Preston Hollow, Dallas, a neighborhood
  • PH postcode area, postcode area in Scotland

Science and technology

Chemistry

  • Phenyl group, either -Ph or Φ, highly-stable and aromatic hydrocarbon unit found in many organic compounds
  • Pleckstrin homology 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 described by RFC 2378
  • PH (complexity), the union of all complexity classes in the polynomial hierarchy in computational complexity theory

Physics

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

Other sciences

  • Planet Hunters, a group that hunts for exoplanets
  • Precipitation hardening, a heat treatment technique used to increase the yield strength of malleable materials
  • Pulmonary hypertension, a medical condition

Other uses

  • pʰ, a phoneme
  • Ph (digraph), a common digraph that represents the phoneme /f/ (voiceless labiodental fricative) in phonetics
  • PH, abbreviation for professional hunter 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 (phonetically)
  • pH Care, a feminine hygiene brand in the Philippines owned by UL Skin Sciences, Inc., a subsidiary of Unilab
  • PH (footballer) (born 1991), Brazilian footballer Philippe Guimarães
  • Poul Henningsen (1894–1967), Danish writer and designer known in Denmark as PH
  • Professional hunter
  • Public house, most commonly referred to as pub, an establishment licensed to serve alcoholic drinks
  • Purple Heart, a US military award, in post-nominal designation
  • Pinch hitter, in baseball
  • abbreviation used to denote the English regnal years of Philip II of Spain
  • P<sup>ḥ</sup>, abbreviation (e.g. on maps) for parish, also in the meaning of civil parish
  • Phillips, a type of cross-head screw drive bits
  • ⲣⲏ, Coptic for the Egyptian deity Ra
  • Patrouilleurs Hauturiers program of the French Navy

See also

  • Phi (φ), a letter of the Greek alphabet