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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
Regalia
The ceremonial objects of royal office, such as the crown, presented during a coronation.
Regency
The period from 1811 to 1820 when the Prince Regent exercised royal powers because George III was too ill to rule; the term also describes a broader cultural period around these years.
Regenerated cellulosic fibre
A manufactured fibre made by processing naturally occurring cellulose into a new fibre. In textile classification, this group commonly includes viscose, lyocell and chemically modified cellulose acetate.
Regenerated fibre
A manufactured fibre made by processing natural cellulose and forming it into new fibres, such as Lyocell™.
Regeneration
Action intended to improve a declining area through changes such as investment in its economy, buildings and services.
Regeneration
The improvement of an area through investment in its economy, buildings, infrastructure and community facilities.
Regeneration
The growth or replacement of damaged cells or tissues so that some function may be restored.
Regent
A person appointed to govern on behalf of a monarch, especially during the monarch’s absence.
Reggae
A Jamaican musical style that developed during the 1960s from earlier styles including ska.
Regicide
A person involved in the killing of a monarch; at the Restoration, the term particularly referred to those responsible for Charles I’s trial and execution.
Regicide
The killing of a king or queen.
Regime change
The removal and replacement of a country’s ruling government or leadership.
Regimen sanitatis
Advice about maintaining health through daily habits, including diet and cleanliness.
Region
An area of a coordinate grid representing coordinate pairs with a shared property.
Regional cerebral blood flow
The flow of blood through a particular brain region, used as an indicator of activity in that region. Abbreviated to rCBF.
Regional development
Investment intended to improve a region’s economy and opportunities, particularly where it is disadvantaged compared with other regions.
Regional government
Government operating across a region, between the level of individual local councils and central government.
Regional identity
A sense of belonging to a wider area within a country, such as the North East of England.
Regional inequality
Uneven distribution of income, opportunities and living standards between geographical areas.
Regional mayor
A directly elected leader of an English regional authority with devolved functions and budgets; also called a metro mayor.
Regional migration
The movement of people between different regions within a country.
Regional unrest
Disorder or resistance within an area, such as disturbances, challenges to political authority or communities abandoning their allegiance.
Register
The level and style of language chosen to suit the audience and situation, such as formal or informal language.
Register
The level and kind of language chosen to suit an audience, purpose and situation, such as formal or informal language.
Register
An extremely small, extremely fast storage location inside the CPU that temporarily holds data, instructions or addresses being used during processing.
Register
The style of language used for a particular situation, purpose or audience, including its level of formality.
Registration
The accurate alignment of the separate parts or colours of a printed design.
Registration mark
A printed mark outside the finished design used to check the alignment of colours, print layers or cutting operations.
Regression line
A line of best fit determined by a statistical calculation rather than by eye, usually written as .
Regular
A member of the armed forces who serves full-time as a professional.
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