phonon Syllabification: (pho·non)Pronunciation: /ˈfōnän/Definition of phonon noun Physics a quantum of energy or a quasiparticle associated with a compressional wave such as sound or a vibration of a crystal lattice. Origin: 1930s: from Greek phōnē 'sound', on the pattern of photonphonon in other Oxford dictionaries Definition of phonon in the British & World English dictionary
