quantum(redirected from Quantum (physics))
Also found in: Thesaurus, Medical, Legal, Encyclopedia.
n. pl. quan·ta (-tə)
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.
Relating to or based upon quantum theory.
[Latin, from neuter of quantus, how great; see quantity.]
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]
n., pl. -ta (-tə),
1. quantity or amount: the least quantum of evidence.
2. share; portion.
3. a large quantity.
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.
5. sudden and significant: a quantum increase in productivity.
[1610–20; Latin quantus how much]
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.
Switch to new thesaurus
|Noun||1.||quantum - a discrete amount of something that is analogous to the quantities in quantum theory|
quantity - 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
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
n sing → Quantenmechanik f
n → Quantenzahl f
n sing → Quantenphysik f
n → Quantentheorie f
1. n → quanto
2. adj (number) → quantico/a; (mechanics) → quantistico/a
n. L. quantum, unidad de energía.