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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
Saturated solution
A solution containing the maximum amount of dissolved solute at a particular temperature.
Saturation
The condition in which the spaces within soil are filled with water.
Saturn
The Roman god associated with sowing and seed, believed to have ruled during the Golden Age.
Saturnalia
A Roman festival in honour of Saturn, beginning on 17 December and involving sacrifice, feasting, gifts and temporary relaxation of social hierarchies.
Satyagraha
‘Insistence on truth’: Gandhi’s approach to resisting injustice through non-violent action rather than harming opponents.
Satyr play
A humorous mythological drama with a chorus of satyrs, the animal-featured companions of Dionysus, normally performed after a playwright’s three tragedies.
Sautéing
Cooking food quickly in a small amount of fat in a hot pan.
Savanna
Tropical grassland dominated by grasses with scattered trees and a distinct dry season.
Sawm
Fasting, particularly the obligatory fast during Ramadan.
Sawn timber
Timber supplied with the relatively rough surface left by sawing.
Sa’y
Making seven journeys between Safa and Marwah, remembering Hajira’s search for water for Isma’il.
Sayyid
A descendant of Hashim, the Prophet Muhammad's great-grandfather. The share of Khums reserved for sayyids supports eligible members of this family.
Scab
The dried protective covering that develops over a clot at the skin's surface.
Scaenae frons
The architectural façade of a Roman theatre’s stage building, forming a permanent backdrop and providing doorways for performers.
Scalar
A quantity with a size, or magnitude, but no direction.
Scalar
A quantity with magnitude only, and no direction.
Scalar
An ordinary number used to multiply a vector, changing its magnitude and possibly reversing its direction.
Scalar multiple
A matrix obtained by multiplying every entry of a matrix by the same number. For example, .
Scalar quantity
A quantity with magnitude but no direction.
Scalar quantity
A quantity that has magnitude (size) but no direction.
Scalawags
A hostile nickname for white Southerners who supported the Republican Party and Reconstruction.
Scale
The relationship between a distance on a map or image and the corresponding distance on the ground.
Scale
The relationship between a represented or measured distance and the corresponding actual distance.
Scale
The relationship between a length in a representation and the corresponding length of the object represented.
Scale
The numerical value represented by each division along a graph axis.
Scale
A statement comparing a length on a drawing or map with the corresponding real length.
Scale
The numerical intervals used along a graph axis to represent values.
Scale
The ratio of a length on a drawing or model to the corresponding actual length, using the same units.
Scale bar
A marked line showing the ground distances represented by lengths on a map.
Scale bar
A labelled line on an image whose length represents a stated real distance in the specimen.
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