(physics) The length of a single cycle of a wave, as measured by the distance between one peak or trough of a wave and the next; it is often designated in physics as λ, and corresponds to the velocity of the wave divided by its frequency.

plural of wavelength

(idiomatic) In rapport or complete accord.

Alternative spelling of multiwavelength

(physics) the wavelength, λ=h/p, associated with a beam of particles of momentum p. (h being Planck's constant.) The same formula gives the momentum of a photon or wavelength λ.

plural of de Broglie wavelength