quantum
KWAHN-tum
/ˈkwɑːntəm/
The smallest discrete unit of a physical property, such as energy or matter.
In nanotechnology, it refers to the scale where classical physics breaks down and particles behave like waves.
The story behind the word. Latin for 'how much'. It was adopted by Max Planck in 1900 to describe the 'packets' of energy that he discovered, launching the field of quantum physics.
Word relationships
- discrete: Discrete means separate and distinct, which is a key property of a quantum.
- continuous: Refers to something that changes smoothly without discrete steps.
Commonly confused with
- classical: Classical physics deals with the predictable world of large objects; quantum deals with the unpredictable world of the very small.
Word family
- quantize (verb): To restrict a variable to discrete values.
Collocations
- quantum mechanics
- quantum computing
- quantum physics
- quantum dot
Idioms & expressions
- quantum leap
Example sentences
- "I think I can safely say that nobody understands quantum mechanics." Richard Feynman's lectures on physics. (The Character of Physical Law by Richard Feynman)
- "Quantum dots are being used to create displays with more vibrant and accurate colors." Describing a new type of computer.
Memory hook
A 'Quantum' is the 'Quantity' of the smallest possible thing. Smallest possible packet.
When not to use
Avoid using 'quantum leap' to mean a 'huge jump' in scientific circles; technically, a quantum leap is the smallest possible change.
Fun facts
- The word was originally used in legal contexts to mean 'an amount' before it became a physics term.
Explore more words
Nanomaterial, photovoltaic, particulate, Digital, Properties, Molecule
Take your vocabulary further with LangBlitz
Our English vocabulary app: FSRS spaced repetition, 5,000+ curated words across 119 topic groups, CEFR A1 to C2. Explore your mastery with the beautiful Vocabulary World feature.