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quantum

 [kwon´tum] (L.)
an elemental unit of energy; the amount emitted or absorbed at each step when energy is emitted or absorbed by atoms or molecules.

quan·tum

, pl.

quan·ta

(kwahn'tŭm, -tă),
1. A unit of radiant energy (Q) varying according to the frequency (ν) of the radiation.
2. A certain definite amount.
[L. how much]

quantum

/quan·tum/ (kwon´tum) pl. quan´ta   [L.] a unit of measure under the quantum theory (q.v.).

quan·tum

, pl. quanta (kwahn'tŭm, -tǎ)
1. A unit of radiant energy (ε) varying according to the frequency (ν) of the radiation.
2. A certain definite amount.
[L. how much]

quantum

  1. a quantity or amount.
  2. the minimum quantity in which a neurotransmitter is secreted.
  3. a unit of light.

photon 

The basic unit of radiant energy defined by the equation
E = hν
where h is Planck's constant (6.62 ✕ 10−34 joule ✕ second), ν the frequency of the light and E the energy difference carried away by the emission of a single photon of light. The term photon usually refers to visible light whereas the term quantum refers to other electromagnetic radiations. See quantum theory; wave theory; troland.

quan·tum

, pl. quanta (kwahn'tŭm, -tǎ)
Unit of radiant energy (Q) varying by frequency (ν) of radiation.
[L. how much]

quantum (kwon´təm),

n a discrete unit of electromagnetic energy or of a roentgen. A quantity becomes quantized when its magnitude is restricted to a discrete set of values as opposed to a continuous set of values.
quantum theory,

quantum

pl. quanta [L.] an elemental unit of energy; the amount emitted or absorbed at each step when energy is emitted or absorbed by atoms or molecules.

quantum theory
radiation and absorption of energy occur in quantities (quanta) which vary in size with the frequency of the radiation.
References in periodicals archive ?
A major change to the QuantAM release for 2017 is the move to the 3D ACIS modeling kernel and away from the reliance solely on an STL representation of the model.
The Nomura Quantam SolCap Europe Fund addresses material concerns of high downside risks attached to equity investments, and facilitates a potential reduction of the equity capital charge at a maximum of 15 per cent under Solvency II (under standard formula) due to its formal bank guarantee (Commission Solvency II Delegated Regulation (EU) 2015/35).
Observing Bobby Robson in his dealings with the media yesterday, his amicable manner and obvious determination to help Steve Staunton make the quantam leap from coaching duties at Walsall to management in the Euro 2008 qualifiers shone through.
Come e facile prevedere, il divario tra presente e passato si costruisce tutto a svantaggio del presente e la condizione in cui si trova il testo di Livio diviene presto il segno della natura post-lapsaria del tempo in cui Petrarca si trova a vivere--un'idea sintetizzata nell'apostrofe al centro del passo citato: O quantam etatis nostre maculam
business development at Quantam Television was named Vice
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You can also discover the truth behind the myths of aliens, yetis and dragons, you'll be holding your own the next time quantam physics comes up in conversation.
Then we would move on to the body treatments and, to finish, she would give me a session with the Quantam face probes to help lift my jaw, saggy eyes and chin.
This increase was primarily the result of continued growth in Roslyn's newest core deposit products, Quantam Savings, Free Checking and Charter Money Market.
Airports Company South Africa handed over two Toyota Quantam buses to Hope School in Westcliff today.
They have nothing to lose but they'll find there's a quantam leap between the first division and the premiership.