standard temperature and pressure

noun

One of various standard sets of conditions for experimental measurements used to aid reproducibility. Abbreviated as STP. Often elliptically called standard conditions.

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Meanings

nounstandard temperature and pressure (countable and uncountable, plural standard temperatures and pressures)

plural standard temperatures and pressures

  1. countableuncountablechemistryOne of various standard sets of conditions for experimental measurements used to aid reproducibility. Abbreviated as STP. Often elliptically called standard conditions.
  2. countableuncountablestrictlychemistryThe international, standard conditions used by the IUPAC to aid reproducibility; a temperature of 0 °C (273.15 K) and a pressure of 1 bar (100 kPa). Abbreviated as STP. Often elliptically called standard conditions.

Synonyms & antonyms

Also see
standard conditions
Cite this entry
APA

standard temperature and pressure. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/standard%20temperature%20and%20pressure

MLA

“standard temperature and pressure.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/standard%20temperature%20and%20pressure. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “standard temperature and pressure,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/standard%20temperature%20and%20pressure.

Source: standard temperature and pressure on Wiktionary, CC BY-SA 4.0.