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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
Low organisation skill
A skill whose parts can be separated and practised individually relatively easily.
Low-poly style
A computer-generated visual style using relatively few polygons, giving objects simplified, angular shapes.
Low-pressure system
An area where atmospheric pressure is lower than in surrounding areas. Air moves inwards and rises, encouraging cloud formation and rainfall.
Loya Jirga
A traditional Afghan grand assembly brought together to make important national political decisions.
Loyalism
Organised support for the monarchy and existing constitution, particularly in opposition to revolution.
Loyalist
An American colonist who supported remaining within the British Empire during the War of Independence.
Loyalty
Faithfulness to a person, group or commitment, especially when maintaining it involves difficulty or personal cost.
Loyalty
Faithfulness to a person or household, demonstrated through support and actions even when that commitment is difficult or dangerous.
Lubricant
A material placed between surfaces to reduce friction as they move past one another.
Lubricant
A substance placed between moving surfaces to reduce friction.
Lubricant
A substance used to reduce friction between moving surfaces.
Lubrication
The use of a substance such as oil or grease between moving surfaces to reduce friction.
Lubrication
Applying a lubricant, such as oil, between moving surfaces to reduce friction and unwanted heating.
Lubrication
Applying a lubricant between moving surfaces to reduce friction, wear, heat and noise.
Lucayans
The Indigenous inhabitants of the Bahamas whom Columbus encountered in 1492.
Lucidity
Clear awareness, thought or communication.
Luddite
A worker involved in attacks on textile machinery in 1811–1813, protesting against changes that threatened employment and livelihoods.
Luddites
Workers who attacked textile machinery because they believed it threatened their employment and livelihoods.
Luftwaffe
Germany’s air force during the Second World War.
Lullaby
A soothing song traditionally sung to help a child fall asleep.
Lumen
The space inside a blood vessel through which blood flows.
Lumen
The internal space of a blood vessel through which blood flows.
Lumen
The hollow space inside a blood vessel through which blood flows.
Lumen Gentium
A document of the Second Vatican Council, promulgated in 1964, which explains the nature and mission of the Church.
Lung
One of the two organs in the chest that contain the branching airways and air sacs involved in breathing and gas exchange.
Lung cancer
A disease in which abnormal cells in the lungs grow uncontrollably.
Lupercal
A cave at the Palatine Hill in Rome, believed to be where the she-wolf suckled Romulus and Remus.
Lupercalia
The Roman festival celebrated on 15 February, associated in the play with a ceremonial race and a belief that ritual contact could promote fertility.
Lupercalia
An annual Roman festival held on 15 February, associated with purification, fertility and Rome’s founding myth.
Luperci
The priests who performed the Lupercalia’s sacrifices and ritual run.
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