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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
Embossing
Pressing a design into paper or board so that part of its surface is raised.
Embourgeoisement
The process through which working-class people are thought to become more middle class in their lifestyles, attitudes and values as their living standards rise.
Embourgeoisement thesis
The argument that increasing affluence leads working-class people to adopt middle-class lifestyles, norms and values.
Embroidery
Decorating fabric with stitches made by hand or machine.
Embryo
An early stage in the development of a multicellular organism.
Embryo
An early developing organism formed as a fertilised egg divides.
Embryonic stem cell
A stem cell found in an early embryo that can differentiate into most types of human cell.
Embryonic stem cell
A stem cell from an early embryo that can produce more stem cells and differentiate into most types of human cell.
Embryo screening
Testing an embryo’s genetic material to find out whether particular alleles or genetic conditions are present.
Embryo screening
Testing cells from embryos for genetic conditions, allowing the results to inform decisions about which embryos to place in the womb.
Embryo transplant
An animal-cloning method in which cells of an early embryo are separated and the resulting identical embryos are transferred into host mothers.
E-media
Electronic communication channels, such as email, websites and social media, used to share information or communicate with others.
Emergency aid
Help provided to people affected by a disaster, including money, food, water, shelter, equipment and medical care.
Emergency aid
Immediate, short-term assistance, such as food, water, shelter and healthcare following a disaster.
Emergency planning
Preparing people, services, routes, shelters and supplies before a hazardous event so that they can respond effectively.
Emergency relief
Urgent assistance, such as food, drinking water and medical treatment, provided to protect people during a crisis.
Emerging and developing country
A country experiencing economic development and growing integration into the world economy, but where incomes and living conditions remain uneven.
Emerging and developing country (EDC)
A country outside the advanced and low-income developing groups, with a developing economy. These countries vary greatly in income and living conditions.
Emerging country
A country undergoing economic development and becoming more influential in the global economy.
Emerging economy
A country experiencing economic development and increasing participation in the global economy, such as China or India.
Emigration
Leaving a country to settle in another country.
Emigration
Movement out of a country. UK long-term emigration statistics count people leaving the UK for at least 12 months.
Emigration
Leaving one country to live in another.
Emigration
Movement out of a country to live elsewhere.
Emirate
A political system ruled by an emir. The Taliban described the Afghanistan it governed as an Islamic Emirate.
Emission
The release of radiation by matter.
Emission
The release of radiation by an object.
Emission
The release of electromagnetic waves, transferring energy away from their source.
Emission factor
The amount of greenhouse-gas emissions associated with one unit of an activity, such as kilograms of CO₂e per kilowatt-hour of electricity used.
Emission spectroscopy
An instrumental technique that identifies elements by analysing the wavelengths of light emitted by a hot sample.
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