# quantum

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Related to quantum: quantum physics, quantum theory, Quantum computing, Quantum numbers

## quan·tum

(kwŏn′təm)*n.*

*pl.*

**quan·ta**(-tə)

**1.**

*Physics*

**a.**The smallest amount of a physical quantity that can exist independently, especially a discrete quantity of electromagnetic radiation.

**b.**This amount of energy regarded as a unit.

**2.**A quantity or amount.

**3.**A specified portion.

**4.**Something that can be counted or measured.

**5.**A unit of acetylcholine, released at the synaptic cleft of a neuromuscular junction.

*adj.*

Relating to or based upon quantum theory.

[Latin, from neuter of

`quantus`,*how great*; see**quantity**.]## quantum

(ˈkwɒntəm)*n*,

*pl*

**-ta**(-tə)

**1.**(Atomic Physics)

*physics*

**a.**the smallest quantity of some physical property, such as energy, that a system can possess according to the quantum theory

**b.**a particle with such a unit of energy

**2.**amount or quantity, esp a specific amount

**3.**(

*often used with a negative*) the least possible amount that can suffice: there is not a quantum of evidence for your accusation.

**4.**something that can be quantified or measured

**5.**(

*modifier*) loosely, sudden, spectacular, or vitally important: a quantum improvement.

[C17: from Latin

*quantus*(adj) how much]## quan•tum

(ˈkwɒn təm)*n.,*

*pl.*

**-ta**(-tə),

*adj.*

*n.*

**1.**quantity or amount: the least quantum of evidence.

**2.**share; portion.

**3.**a large quantity.

**4.**

**a.**the smallest excitation of a quantized wave or field, as a photon or phonon.

**b.**the fundamental unit of a quantized physical property, as angular momentum, and the smallest amount by which its magnitude can change.

*adj.*

**5.**sudden and significant: a quantum increase in productivity.

[1610–20; Latin

*quantus*how much]## quan·tum

(kwŏn′təm)*Plural*

**quanta**

A unit of energy, especially electromagnetic energy, that is the smallest physical quantity that can exist on its own. A quantum acts both like a particle and like an energy wave. Photons are examples of quanta.

ThesaurusAntonymsRelated WordsSynonyms

**Legend:**Switch to new thesaurus

Noun | 1. | quantum - a discrete amount of something that is analogous to the quantities in quantum theoryquantity - the concept that something has a magnitude and can be represented in mathematical expressions by a constant or a variable |

2. | quantum - (physics) the smallest discrete quantity of some physical property that a system can possess (according to quantum theory)quantity, measure, amount - how much there is or how many there are of something that you can quantify natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics" quasiparticle - a quantum of energy (in a crystal lattice or other system) that has position and momentum and can in some respects be regarded as a particle |

## quantum

*noun*

Translations

**quàntum**

**kvantti**

**määrä**

**määrällinen**

**merkittävä**

**suuri**

**kvantum**

**mennyiség**

**量**

**量子**

**quantum**

## quantum

*n pl*<quanta> (Phys) → Quant

*nt*; the quality of life cannot be measured as a

**quantum**→ Lebensqualität kann nicht in Zahlen ausgedrückt werden; the

**quantum**of satisfaction → das (Aus)maß an Zufriedenheit

## quantum

:**quantum mechanics**

**quantum number**

*n*→ Quantenzahl

*f*

**quantum physics**

**quantum theory**

## quantum

[ˈkwɒntəm] (*Phys*)

**1.**

*n*→ quanto

**2.**

*adj*(

*number*) → quantico/a; (

*mechanics*) → quantistico/a

## quan·tum

*n. L.*quantum, unidad de energía.

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