| QCD |
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initialism
- (physics) quantum chromodynamics, Quantum Chromodynamics
- (lean manufacturing) Quality, Cost, Delivery
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| QED |
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initialism
- quod erat demonstrandum, Quod erat demonstrandum (Latin what had to be proved or what was to be demonstrated).
- quantum electrodynamics
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| quality |
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noun (qualit, ies)
- (uncountable) Level of excellence
- This school is well-known for having teachers of high .
- Quality of life is usually determined by health, education, and income.
- (countable) A property or attribute that differentiates a thing or person.
- One of the qualities of pure iron is that it does not rust easily.
- While being impulsive can be great for artists, it is not a desirable for engineers.
- security, Security, stability, and efficiency are good qualities of an operating system.
- (thermodynamics) In a two-phase liquid-vapor mixture, the ratio of the mass of vapor present to the total mass of the mixture.
- (archaic) high, High social position.
- A peasant is not allowed to fall in love with a lady of .
- membership, Membership of this golf club is limited to those of and wealth.
- The correspondence between a goal and its outcome -- between intent and result of action.
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| quanta |
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noun
- Plural of quantum.
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| quantize |
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verb (quantiz, ing)
- (context, transitive, physics) To limit the number of possible values of a quantity, or states of a system, by applying the rules of quantum mechanics
- (context, transitive, telecommunication) To approximate a continuously varying signal by one whose amplitude can only have a set of discrete values
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| quantum chromodynamics |
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noun
- (physics) A quantum field theory in particle physics which describes the strong interaction of quark, quarks and gluon, gluons employing the concept of color charge.
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| quantum electrodynamics |
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noun (abbreviated as QED)
- (physics) the study of the interaction of electromagnetic radiation with electrically charged matter within the framework of relativity and quantum mechanics
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| quantum mechanics |
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noun
- (physics) That branch of physics which studies matter and energy at the level of atoms and other elementary particles, and substitutes probabilistic mechanisms for classical Newtonian ones.
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| quantum number |
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noun
- (quantum) One of certain integers or half-integers that specify the state of a quantum mechanical system (such as an electron in an atom).
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| quantum state |
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noun - (physics) any of the possible states of a quantum mechanical system
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| quark |
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noun
- (particles) In the Standard Model, an elementary subatomic particle which forms matter. Quarks are never found alone in nature and combine to form hadrons, such as protons and neutrons.
- 1993: Gell-Mann won the linguistic battle once again: his choice, a croaking nonsense word, was "quark". (After the fact, he was able to tack on a literary antecedent when he found the phrase "Three quarks for Muster Mark" in Finnegans Wake, but the physicists quark was pronounced from the beginning to rhyme with "cork".) — w:James Gleick, James Gleick, Genius: Richard Feynman and Modern Physics
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