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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
Guru Nanak
The founder of Sikhism and the first Sikh Guru, whose teachings emphasise remembering God rather than displaying powers to impress others.
Gusset
A reinforcing piece attached across a joint; in frame modelling, a triangular card piece glued over the meeting timber strips.
Gustatio
The opening course of a Roman dinner, containing foods intended to stimulate the appetite, such as eggs, olives and lettuce.
Gutka
A small book containing Sikh prayers, used for daily recitation.
Gutta
An outline medium used on silk to form a barrier that prevents silk paint spreading across the outline.
Gytrash
A North-of-England spirit in the stories Jane remembers, which appears as a horse, mule or large dog and haunts lonely roads.
Habeas corpus
A legal safeguard allowing the lawfulness of a person’s detention to be challenged in court.
Haber process
An industrial process in which nitrogen and hydrogen react under controlled conditions to manufacture ammonia.
Haber process
The industrial manufacture of ammonia by reacting nitrogen with hydrogen using an iron catalyst at 450 °C and 200 atmospheres.
Habitat
The place where an organism lives, providing the conditions and resources it needs to survive.
Habitat
The natural environment in which an organism lives.
Habitat
The place and conditions in which an organism lives and obtains the resources it needs.
Habitat
The place where an organism lives.
Habitat conversion
The replacement of a natural habitat with another land use, such as a crop plantation.
Habitat destruction
The loss or damage of the natural environment in which organisms live, removing the food, shelter and other conditions they need.
Habitat fragmentation
The breaking up of a continuous habitat into smaller, separated areas.
Habitat fragmentation
The division of a habitat into smaller, separated areas.
Habitat fragmentation
The division of a continuous habitat into smaller, separated areas, for example by roads or cleared pipeline routes.
Habitat loss
The destruction or removal of the place where an organism normally lives.
Habitat regeneration
The restoration of a damaged habitat so that it can support its communities of organisms again.
Habitat restoration
Repairing a damaged habitat by improving its conditions and restoring the natural processes that support wildlife.
Habooba
An Arabic word meaning ‘beloved woman’, used in Sudan to refer to a grandmother.
Habsburgs
The ruling dynasty to which Charles V belonged. His possessions included Spain as well as territories associated with the Holy Roman Empire.
Hacking
Gaining unauthorised access to a computer or computer system.
Hacking
Gaining unauthorised access to a computer system.
Hack-silver
Pieces of silver, including cut coins and jewellery, used for payment according to their weight.
Hadd punishment
A prescribed penalty in Islamic law for certain offences; distinct from qisas.
Hadith
A report of Muhammad’s sayings or actions; collections of these reports help Muslims understand and follow his example.
Hadith compilation
The process of gathering Hadith reports into collections and examining their reliability.
Hadith of the pond of Khumm
An account of Muhammad’s speech at Khumm, understood by Shi’a Muslims as appointing Ali as his successor and by Sunni Muslims as affirming that Ali should be held in high regard.
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