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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
Future hope
The expectation that God’s rule will be fully established in the future, overcoming the evil still present in the world.
Future Kingdom
The understanding that the full establishment of God’s rule still lies ahead, bringing the fulfilment of salvation and eternal life.
Fyrd
An Anglo-Saxon force called up for military service when required, supplementing the professional warriors. Its soldiers varied in training and equipment.
Gabion
A wire cage filled with stones and placed along the coast to absorb wave energy.
Gacha
A game mechanic through which players obtain items, such as collectible cards, through chance-based draws.
Gain
The ratio of an amplifier’s output signal to its input signal. Voltage gain is ; current gain compares output current with input current.
Galaxy
A huge collection of stars, gas and dust held together by gravity.
Galen
An ancient Roman physician whose writings remained influential in medieval English medicine.
Gall
A knobbly swelling formed by abnormal, disorganised growth of plant tissue.
Gall
A swollen growth of plant tissue; in crown gall disease, it forms when bacteria stimulate disorganised cell growth.
Galleon
A large sailing ship used for warfare or carrying cargo during the sixteenth century.
Galleries
Tiered seating areas surrounding a theatre’s yard; in outdoor playhouses, these were roofed.
Gallery
The collection of Hailsham students’ artwork assembled to demonstrate their humanity to the outside world, not to assess whether couples deserve a deferral.
Galvanised steel
Steel protected by a coating of zinc to resist rusting.
Galvanising
Coating iron or steel with zinc to protect it from rusting.
Galvanising
Coating iron or steel with zinc to protect it against rusting.
Galvanism
The electrical stimulation of muscles, associated with experiments that made animal tissue and parts of human corpses move.
Gamelion
An Athenian calendar month associated with weddings and sacred to Hera, the patron goddess of marriage.
Games console
An electronic system designed for playing video games, such as Sony’s PlayStation.
Gamesmanship
Attempting to gain an advantage by bending the rules to their limit without breaking them, using tactics that go against the spirit of fair play.
Gamete
A reproductive cell containing one chromosome from each pair; human sperm and egg cells each contain 23 chromosomes.
Gamete
A reproductive cell, such as an egg or sperm, containing one chromosome from each pair rather than both.
Gamma camera
A detector that records gamma rays from a radioactive tracer in the body to produce an image of its distribution.
Gamma radiation
High-energy electromagnetic radiation emitted by a nucleus as it loses excess energy.
Gamma radiation
Electromagnetic radiation emitted when a nucleus loses energy, with no change in its mass number or atomic number.
Gamma ray
A high-energy electromagnetic wave emitted from the nucleus.
Gamma ray
An electromagnetic wave originating from a change in an atomic nucleus.
Gamma rays
High-frequency electromagnetic radiation emitted during changes in an unstable atomic nucleus.
Gan Eden
Literally ‘Garden of Eden’; also used in Jewish thought for a heavenly existence or closeness to God after death.
Ganesha
The elephant-headed deity associated with removing obstacles; the son of Shiva and Parvati.
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