wavelength
Pronunciation:
/ˈweɪvlɛŋ(k)θ//ˈweɪvˌlɛŋ(k)θ/noun
Definitions
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.