ˈkwɔntəm 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. øquantum
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. [L, neut. of quantus how much]