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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
Yeast
A single-celled fungus that supplies the enzymes needed to ferment sugars.
Yeast
A single-celled fungus used in bread making because it releases carbon dioxide when it ferments sugars.
‘Yellow Peril’
Racist ideas portraying Chinese and other East Asian people as a threat to Western societies. These were prejudiced beliefs, not reliable descriptions of migrants.
Yeoman
A farmer who owned and worked their own land, sometimes employing labourers.
Yetzer ha-ra
The human inclination towards wrongdoing, which a person must learn to control.
Yetzer hara
The inclination towards selfishness or wrongdoing in Jewish teaching.
Yetzer ha-tov
The human inclination towards good actions.
Yetzer tov
The inclination towards goodness in Jewish teaching.
Yiddish
A language historically spoken by many Jewish communities in Central and Eastern Europe.
Yield
The amount of agricultural produce obtained from a given area of land.
Yield
The amount of crop or other agricultural product produced, often measured per unit area.
Yield
The amount of product obtained from a chemical reaction.
Yield
The amount of useful crop harvested, often measured per unit area of farmland.
Yield
The number of usable pieces that can be obtained from a sheet or length of stock.
y-intercept
The value of the vertical-axis quantity where a graph crosses the vertical axis, at .
y-intercept
The value of where a line crosses the -axis; it is in .
Y-intercept
The value of y where a line crosses the y-axis, when .
Yoga
A spiritual discipline directed towards union with the divine; in Hinduism, it is not limited to physical exercises.
Yoke
A frame placed across the necks of working animals. As a metaphor for marriage, it can suggest restraint, submission or being joined to another.
Yom Kippur
The holiest day in the Jewish religious calendar. Egypt and Syria launched their October 1973 attack on this day, when many Israeli soldiers were off duty.
Yom Kippur
The Day of Atonement, the holiest day of the Jewish year, devoted to repentance and seeking God's forgiveness.
Yom Kippur War
The October 1973 war in which Egypt and Syria attacked Israeli forces in the Sinai Peninsula and the Golan Heights.
Young Pioneers
A Communist children’s organisation which used group activities and political education to encourage loyalty to the new society.
Young Plan
The plan negotiated in 1929 that reduced Germany’s total reparations bill and extended repayment to 1988.
Youth court
A special type of magistrates’ court in England and Wales dealing with people aged 10–17.
Youth crime
Unlawful behaviour by young people, such as theft, vandalism or assault.
Youth culture
The distinctive tastes, fashions, behaviour and values shared by groups of young people.
Youth culture
Shared ways of life among young people, including values, behaviour and styles of dress that distinguish them from older generations.
Youthful population
A population with a large proportion of children and young people.
Youth Justice Board
The public body responsible for overseeing the youth justice system in England and Wales and supporting improvements in its services.
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