quantum mechanics
noun
plural in form but singular or plural in construction
: 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
adjective
quantum mechanically
adverb
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Merriam-Webster unabridged
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