Meaning of QUANTUM MECHANICS in English

QUANTUM MECHANICS

[quantum mechanics] n pl but sing or pl in constr (1922): a theory of matter that is based on the concept of the possession of wave properties by elementary particles, that affords a mathematical interpretation of the structure and interactions of matter on the basis of these properties, and that incorporates within it quantum theory and the uncertainty principle--called also wave mechanics -- quantum mechanical adj -- quantum mechanically adv

Merriam-Webster English vocab.      Английский словарь Merriam Webster.