Loading…
Loading…
Browse key terms and definitions across all GCSE subjects. Search by keyword or filter by subject and exam board.
23,110 key terms
Naming convention
An agreed pattern for naming variables, constants and subprograms consistently.
Naming rights
An arrangement in which a company pays for a venue or competition to carry its name.
Nam Japna
Remembering and meditating on God's name.
Nam Myoho Renge Kyo
A chant expressing dedication to the teaching of the Lotus Sutra, used in Nichiren Buddhism.
Namo Buddhaya
A Buddhist expression meaning ‘Homage to the Buddha’, used in Theravada devotional recitation.
Nam Simran
Remembering and meditating on God’s name.
NAND gate
A logic gate that produces the opposite output to an AND gate: its output is LOW only when all its inputs are HIGH.
Nanny of the Maroons
An eighteenth-century spiritual and military leader of Jamaica’s Windward Maroons, recognised as a Jamaican national heroine and associated with resistance to British colonial rule.
Nanny state
A critical term used by people who believe government interferes too much in individuals' choices, often in the name of protecting their health or welfare.
nano-
A billionth of a unit, equal to of that unit.
Nanomaterial
A material with particles or features on the nanometre scale, typically around 1–100 nm, which can have different properties from larger-scale forms of the same material.
Nanometre
A unit of length equal to metres; its symbol is .
Nanometre
A unit of length equal to one billionth of a metre: .
Nanometre
A unit of length equal to , or one billionth of a metre. Its symbol is nm.
Nanometre (nm)
A unit equal to one billionth of a metre: .
Nanometre (nm)
A unit of length equal to one billionth of a metre: .
Nanometre (nm)
One billionth of a metre, written as m.
Nanometre (nm)
A unit of length equal to metres. There are 1000 nanometres in one micrometre.
Nanoparticle
A structure between 1 nm and 100 nm in size, typically containing of the order of a few hundred atoms.
Nanoparticle
A particle approximately 1–100 nanometres in size. Its properties may differ from those of the same material in bulk.
Nanoparticulate material
A material made from, or containing, particles between 1 nm and 100 nm in size.
Nanoscale
The range of dimensions measured in nanometres, usually referring to dimensions from about 1 nm to 100 nm.
Nanoscience
The study and use of structures whose dimensions are between 1 nm and 100 nm.
Nanotechnology
The use and control of structures that are approximately 1–100 nm in size.
Nanotechnology
Technology that uses structures on the nanometre scale to make materials or devices with useful properties.
Naos / cella
The main room of a Greek temple, which housed the cult statue; cella is the Latin term.
Nap
The direction in which a fabric’s raised surface fibres lie, affecting its appearance and feel.
Napalm
A highly flammable, jelly-like substance used in incendiary bombs, which sticks to surfaces and causes severe burns.
Narcotic analgesic
A powerful painkilling drug that reduces the perception of pain.
Nard
A costly aromatic substance used in the ointment that the woman poured on Jesus’ head at Bethany.
Create a free account to keep every note you open and track your progress.