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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
Breathing rate
The number of breaths taken in a given time, usually measured in breaths per minute.
Breathing rate
The number of breaths taken per minute.
Breathing rate
The number of breaths taken in one minute.
Breath volume
The volume of air breathed in or out in one breath.
Breath volume
The volume of air moved into or out of the lungs in one breath.
Breech-loading
Loading ammunition through the rear of a gun barrel rather than through its muzzle.
Breeding programme
A conservation programme that breeds endangered organisms to increase their population and help prevent extinction.
Brexit
Britain’s withdrawal from the European Union, approved in the 2016 referendum and carried out in 2020.
Brexit
The United Kingdom’s withdrawal from the European Union, following the 2016 referendum.
Brezhnev Doctrine
The Soviet policy announced in 1968 claiming a right to intervene where communist rule was threatened, limiting the independence of communist states.
Bribe
Money or another benefit offered to influence someone to misuse their position.
Bricolage
An aesthetic created by combining varied objects and materials, as in the eclectic collages and possessions in Juno’s bedroom.
Bridewell
A local place of detention used to hold people in custody.
Bridge hold
A way of holding food with the thumb and fingers on opposite sides, forming an arch under which the knife cuts.
Brigantes
A large British people whose territory lay in northern Britain. Their internal conflict helped create the circumstances for Roman military intervention.
Brigantine
A small sailing warship. Cortés used thirteen brigantines on Lake Texcoco during the attack on Tenochtitlan.
Brihadaranyaka Upanishad
A Hindu sacred text containing philosophical teachings, including discussion of the relationship between many gods and one ultimate reality.
Brine
Concentrated salt water left over from desalination.
Brine
A solution of sodium chloride in water.
Brinkmanship
Attempting to force an opponent to give way by taking a confrontation close to war.
Brit Bat
A ceremony welcoming a baby girl into the Jewish community and covenant, often including naming and blessings.
British Black Panthers
A Black activist organisation formed in Britain in 1968 that campaigned against racist policing and discrimination in housing, education and employment.
British Empire
Territories and peoples ruled or controlled by Britain beyond Britain itself.
Britishness
A sense of belonging to the United Kingdom and identifying with shared British values and traditions.
British Psychological Society
A professional organisation for psychology in Britain that sets ethical and professional standards, including its Code of Ethics and Conduct.
British Raj
The period of direct British Crown rule in India beginning in 1858.
British subject
A legal status historically based on allegiance to the British Crown. Under the British Nationality Act 1948, citizens of the UK and Colonies and citizens of independent Commonwealth countries shared this status.
Brit milah
The Jewish ceremony of male circumcision, traditionally performed when a baby is eight days old, marking the continuing Covenant with Abraham.
Brittle
Likely to fracture with little bending or other deformation when a force is applied.
Brittle
Likely to break or shatter rather than bend when struck.
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