(now chiefly South Asia or law) The total amount of something; quantity. / The amount or quantity observably present, or available.

Of a change, sudden or discrete, without intermediate stages. / (informal) Of a change, significant. / (physics) Involving quanta, quantum mechanics or other aspects of quantum physics.

(physics) The condition of being quantum in nature

plural of quantum

(quantum mechanics) The limit on measurement accuracy at quantum scales due to back-action effects. / (spectroscopy) The shortest wavelength in an X-ray spectrum.

Alternative form of quantum mechanical

(physics) A superfluid quantum gas composed of polarized electric or magnetic dipoles

(quantum mechanics) Any of several quantum mechanical effects in which a particle disobeys the laws of classical mechanics.

Of or pertaining to quantum mechanics.

(physics) A theory developed in the early 20th century, according to which nuclear and radiation phenomena can be explained by assuming that energy only occurs in discrete amounts called quanta.