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quantum

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quantum

Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++
Related topics: Power
quan·tum /ˈkwɒntəm $ ˈkwɑːn-/ noun (plural quanta /-tə/) [countable] technical  TPa unit of energy in nuclear physics 量子
Examples from the Corpus
quantumActually, quantum descriptions are very precise, as we shall see, although radically different from the familiar classical ones.Because string theory has so much symmetry, it can accommodate the disparate faces of nature displayed by gravity and quantum theory.Of course, there is nothing intrinsically quantum mechanical in what has been said so far.Finally there is quantum electrodynamics, which is the quantum field theory of light and charged particles.But at the quantum level these terms give important interference effects.The first derives from the quantum theory.In the quantum theory of gravity, on the other hand, a third possibility arises.Contemporary cosmology even suggests that the whole universe might have appeared out of the quantum vacuum: the ultimate free lunch.
Origin quantum (1600-1700) Latin quantus; → QUANTITY
quan·tum nounChineseSyllable
energy nuclear Corpus of unit a physics in


quantum
quantum /ˈkwɒntəm $ ˈkwɑːn-/ noun (plural quanta /-tə/) [countable] technical
 Date: 1600-1700
 Language: Latin
 Origin: quantus; quantity
a unit of energy in nuclear physics


quan·tumBrE /ˈkwɒntəm/ 🔊NAmE /ˈkwɑːntəm/ 🔊 noun (
plural
quanta BrE /ˈkwɒntə/ 🔊 NAmE /ˈkwɑːntə/ 🔊
)
(physics 物理)
a very small quantity of electromagnetic energy 量子