(physics) The branch of physics concerned with phonons.

Relating to the study of phonons.

(physics) The quantum of acoustic or vibrational energy (sound), considered a discrete particle rather than a wave. / (linguistics) A unit of phonemics.

plural of phonon

A periodic nanostructure that exhibit periodicity in its structure that results in bandgaps where energy cannot propagate, as well as negative refraction that can be exploited for wave focusing.

plural of phononic crystal