1. quantum(n = noun.cognition) - a discrete amount of something that is analogous to the quantities in quantum theory;
is a kind of quantity
Derived form adjective quantal1
2. quantum(n = noun.cognition) - (physics) the smallest discrete quantity of some physical property that a system can possess (according to quantum theory);
is a kind of amount, measure, quantity
has particulars: quasiparticle
Derived form adjective quantal1
1. Quantity; amount. Burke. [1913 Webster]
2. A definite portion of a manifoldness, limited by a mark or by a boundary. W. K. Clifford. [1913 Webster]
quantum, n. (pl. quanta)
1 Physics a a discrete quantity of energy proportional in magnitude to the frequency of radiation it represents. b an analogous discrete amount of any other physical quantity.
2 a a required or allowed amount. b a share or portion.
Idiom:
quantum jump (or leap)
1 a sudden large increase or advance.
2 Physics an abrupt transition in an atom or molecule from one quantum state to another. quantum mechanics (or theory) Physics a system or theory using the assumption that energy exists in discrete units.
Etymology:
L, neut. of quantus how much
N quantity, magnitude, size, amplitude, magnitude, mass, amount, sum, quantum, measure, substance, strength, force, mathematics, mathesis, category, general conception, universal predicament, armful, handful, mouthful, spoonful, capful, stock, batch, lot, dose, yaffle, quantitative, some, any, aught, more or less, a few, to the tune of, all of, a full, the sum of, fully, exactly, precisely.
N apportionment, allotment, consignment, assignment, appointment, appropriation, dispensation, distribution, division, deal, repartition, partition, administration, dividend, portion, contingent, share, allotment, fair share, allocation, lot, measure, dose, dole, meed, pittance, quantum, ration, ratio, proportion, quota, modicum, mess, allowance, suerte, apportioning, respective, respectively, each to each.
quantum chromodynamics, quantum electrodynamics, quantum field theory, quantum jump, quantum leap, quantum mechanics, quantum physics, quantum theory