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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
Triple Entente
The relationship linking Britain, France and Russia by 1907 through separate agreements, rather than a single three-country military treaty.
Triple shift
The combination of paid work, domestic work and emotional work, such as maintaining relationships and supporting family members.
Triplet
Three related words, phrases or clauses arranged together to give a statement rhythm and emphasis.
Triplet code
A sequence of three DNA bases that codes for a particular amino acid.
Triratna
A Buddhist movement founded by Sangharakshita whose communities put Buddhist teachings into practice through activities including meditation, generosity and service.
Triratna Buddhist Community
A Buddhist community whose devotional practices draw on both Theravada and Mahayana traditions.
Trireme
A warship powered by oars arranged in three levels, central to the naval strength of Athens and the Delian League.
Trireme
An ancient Mediterranean warship propelled by rowers arranged at three levels on each side.
Trittys
One of the thirty groups of demes organised by Cleisthenes. Each new tribe combined one city, one coastal and one inland trittys.
Triumph
A ceremonial celebration of Roman military victory; triumphal imagery includes chariots, trophies and victory monuments.
Triumph
A formal Roman procession celebrating a major military victory and honouring the victorious commander.
Triumphal decorations
Honours recognising military success without granting the recipient a full triumphal procession.
Triumvir
A member of a three-man ruling alliance. Antony, Octavius and Lepidus become Rome's triumvirs in Julius Caesar.
Triumvirate
Government or control by three people. After Caesar’s death, Antony, Octavius and Lepidus form a triumvirate.
Trivium
The three foundational subjects of medieval education: grammar, rhetoric and logic.
tRNA
Transfer RNA: an RNA molecule that carries a specific amino acid to a ribosome and has an anticodon complementary to an mRNA codon.
Trochaic metre
A rhythm organised into pairs of syllables in which a stressed syllable is followed by an unstressed syllable.
Trochaic rhythm
A metrical pattern in which each pair of syllables begins with a stressed syllable followed by an unstressed syllable.
Trochaic tetrameter
A metrical pattern with four feet, normally moving from a stressed syllable to an unstressed one. Shakespeare often shortens the final foot in the witches’ chanting.
Trochee
A metrical foot consisting of a stressed syllable followed by an unstressed syllable.
Troglodyte
A cave-dweller. Utterson’s word “troglodytic” suggests that Hyde resembles a supposedly primitive human.
Trojan
Malware disguised as legitimate software, which tricks a user into installing or running it. It does not self-replicate.
Troop surge
The increase in US troop numbers in Iraq announced by President George W. Bush in January 2007 to improve security.
Trope
A recurring device, image or story pattern. A racial trope is a recurring pattern used to represent a racial group.
Trophic level
An organism’s feeding position in a food chain, such as producer or primary consumer.
Trophic level
An organism's feeding position in a food chain.
Trophy
A monument marking a military victory. A commemorative trophy was erected on Cynosura after the Battle of Salamis.
Tropical cyclone
A rotating low-pressure weather system that develops over tropical or subtropical oceans, with organised thunderstorms and winds spiralling towards its centre.
Tropical rainforest
A forest ecosystem with warm temperatures and high rainfall throughout the year.
Tropical storm
A powerful low-pressure weather system with strong winds and heavy rain, called a hurricane, cyclone or typhoon in different regions.
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