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particle

mastery

UK /ˈpɑːtɪk(ə)l/ US /ˈpɑɹtɪkəl/noun

card 1 of 9 · context meaning

Which meaning of 'particle' best matches the usage in the sentence?

The physics of elementary particles in the 20th century was distinguished by the observation of particles whose existence had been predicted by theorists.