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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
Military service tribunal
A body that heard applications for exemption from compulsory military service and decided whether to grant them.
Militia
An armed organisation outside the regular armed forces, often connected to a political, religious or local leader.
Militia
A reserve military force raised for service within Britain, including defence against invasion.
Militia Ordinance
Parliament’s measure of March 1642 claiming control over militia commanders, enforced despite Charles I withholding royal assent.
Millennium Development Goals
Eight international development goals adopted in 2000, with a 2015 deadline, addressing poverty, education, gender equality, health, environmental sustainability and global partnership.
milli-
A thousandth of a unit, equal to of that unit.
Millimetre
A unit of length equal to metres. Its symbol is mm.
Millimetre (mm)
A unit equal to one thousandth of a metre: .
Milling
A machining process that removes material from a workpiece using a rotating cutter with several cutting edges.
Milling
The grinding of cereal grains to produce flour, with cleaning and sifting used to remove impurities and separate material.
Mime
A Roman performance form that could combine speech, movement and comic sketches, usually without masks and with both male and female performers.
Mimicry
An adaptation in which a plant resembles something else and so can trick animals into avoiding it.
Minbar
A raised platform or pulpit from which a preacher delivers a sermon in a mosque.
Minchah
The regular Jewish afternoon prayer service.
Mindfulness
Awareness of present experience, such as breathing, bodily sensations or thoughts.
Mindfulness of breathing
A meditation technique in which a person attends to the sensations of breathing and returns attention to the breath when distracted.
Mind/sense control
Self-discipline over thoughts, desires and impulses, rather than allowing them to control behaviour.
Mind-stream
A causally connected sequence of changing moments of awareness, understood in Tibetan Buddhism to continue across lives without being a permanent soul.
Mineral
A nutrient needed to maintain the efficient working of body systems and general health.
Mineral
An inorganic nutrient needed in small amounts for functions such as building bones, carrying oxygen and controlling fluid balance.
Mineral extraction
Removing useful minerals from the ground for processing or sale.
Mineral ion
A dissolved, electrically charged particle needed as a nutrient for healthy growth and normal cell functions.
Mineral ion
A dissolved mineral nutrient that plants can absorb through their roots and use for growth.
Mineral ions
Electrically charged particles dissolved in soil water that plants require for healthy growth, such as nitrate and magnesium ions.
Mineral replacement
A process in which parts of a dead organism are replaced by minerals as they decay, preserving their shape.
Mineral storage
The skeletal function of holding minerals, including calcium and phosphorus, which can be released when the body needs them.
Miniaturisation
Reducing the size of components or systems while retaining the functions required of them.
Minimum measurement
The smallest acceptable measurement for a component.
Minimum order quantity
The smallest amount of material that a supplier will accept an order for.
Minimum value
The least value a function actually reaches over the domain being considered.
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