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Browse key terms and definitions across all GCSE subjects. Search by keyword or filter by subject and exam board.
23,110 key terms
Puritanism
A Protestant movement seeking to remove remaining Catholic-style practices from the Church of England and make its worship and organisation more thoroughly Protestant.
Puritans
Protestants who wanted further reform of the English Church and greater emphasis on godly behaviour.
Purity of Arms
An Israeli military ethical principle requiring force to be used only for its mission and only to the necessary extent, while protecting human dignity, non-combatants and prisoners.
Purpose
What a writer intends a text to achieve, such as explaining a position or persuading readers to act.
Purpose
What a writer seeks to achieve through a text, such as entertaining, persuading, criticising or presenting a particular image of themselves.
Purposive sample
A sample deliberately selected because participants have a characteristic or experience relevant to the research.
Purposive sampling
Selecting participants because they have a particular characteristic or experience relevant to the research aim.
Purusha
The cosmic Person in Rig Veda 10.90, whose sacrifice brings forth creation, including the four varnas.
Purushartha
One of the four legitimate aims of human life in Hinduism: dharma, artha, kama and moksha.
Purusharthas
The four aims of human life in Hinduism: dharma, artha, kama and moksha.
Purveyance
The Crown’s power to obtain supplies and transport for royal needs, including compelling suppliers to sell goods at fixed prices.
Push factor
A condition that encourages people to leave a place, such as unemployment, persecution or violence.
Push factor
A condition in a person's place of origin that encourages them to leave.
Push factor
A circumstance that encourages or forces someone to leave a place, such as unemployment or persecution.
Push factors
Factors that drive people to leave a place, such as persecution, war or loss of livelihood.
Push fit
A method of assembly in which a component is pushed into a closely fitting space and held without tools.
Push-to-make switch
A normally open switch that closes its contacts while pressed and opens them again when released.
Putsch
An attempt to overthrow a government by force.
PVA
Polyvinyl acetate: a water-based adhesive commonly used to bond porous timber surfaces. Standard grades are mainly suitable for dry indoor use.
P-wave
A longitudinal seismic wave that can travel through solids and liquids.
Pyramid
A solid with a polygonal base and triangular faces that meet at one vertex.
Pyramidal peak
A pointed mountain summit formed as three or more corries erode back towards one another.
Pyramid of biomass
A scaled diagram showing the relative biomass at each trophic level of a food chain.
Pyroclastic flow
A fast-moving flow of very hot gases, ash and rock fragments travelling down a volcano.
Pythagoras’ theorem
The rule for a right-angled triangle, where is its hypotenuse.
Pythagorean identity
The relationship , connecting the squared sine and cosine of the same angle.
Pythagorean triple
A set of three positive integers , and satisfying . They can be the side lengths of a right-angled triangle.
Pythia
The title of Apollo's priestess at Delphi, who delivered answers to people consulting his oracle.
Pyx
A small container used to carry consecrated hosts, particularly when taking Holy Communion to people who are sick.
Pyxis
A small box or lidded container; the Shaft Grave V pyxis is a wooden box covered with gold plates.
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