Meaning of QUANTUM MECHANICS in English

QUANTUM MECHANICS

noun plural but singular or plural in construction Date: 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, quantum mechanical adjective quantum mechanically adverb

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.