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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
Sector
The region of a circle enclosed by two radii and the arc joining their endpoints.
Sector
A region of a circle bounded by two radii and the arc between them; a slice of a pie chart.
Secular
Non-religious: for example, secular courts exercised ordinary legal authority rather than Church authority.
Secular
Not based on religious belief or religious authority.
Secular Buddhism
An approach to Buddhist teaching and practice that emphasises responding to suffering in this life without requiring belief in rebirth.
Secular court
A court administered by non-religious authorities rather than the Church.
Secular ethics
Moral principles that do not depend on belonging to a religion. The Dalai Lama includes compassion, tolerance, caring and responsible use of knowledge.
Secularisation
The process by which religion becomes less influential in society and people’s lives.
Secularisation
The declining influence of religion in society.
Secularism
The separation of religious institutions and the state, with equal treatment for religious and non-religious people.
Secular reading
An interpretation based on human life and values rather than religious belief.
Security
An asset pledged to a lender which may be taken if the borrower fails to repay a secured loan.
Security
Having protection, dependable care and support, including physical safety and emotional stability.
Security of tenure
Protection of a person’s right to occupy their home or land, reducing the risk of eviction.
Security patch
A software update that fixes a known security weakness.
Secutor
A gladiator armed with a sword and shield who fought the retiarius; his smooth helmet lacked ornaments that could catch the net.
SED
The Socialist Unity Party, which dominated East Germany's political system under Soviet influence.
Sedentary
Inactive; engaging in little or irregular physical activity.
Sedentary lifestyle
A way of life involving much sitting and little physical activity.
Sedentary lifestyle
A way of living that involves very little physical activity.
Seder
The ritual meal at Pesach in which the Exodus story is retold through readings, symbolic foods and actions.
Sediment
Loose material, such as sand and shingle, that can be transported and deposited.
Sediment
Particles of solid material that settle and accumulate, often on the floor of a body of water.
Sediment
Solid material that settles and accumulates, for example on the ocean floor.
Sedimentary rock
Rock formed from accumulated sediment that becomes solid through compaction and cementation, or from accumulated remains of organisms.
Sedimentary rock
Rock formed when layers of sediment accumulate and become compacted or cemented together.
Sedimentary rock
Rock formed from accumulated sediments that become compacted and cemented together.
Sedimentation
The settling of suspended solid particles under gravity.
Sedimentation
The settling of suspended solids out of a liquid under gravity.
Sediment cell
A stretch of coastline within which sediment is supplied, transported and deposited. Its connected processes mean that management in one place can affect another.
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