moving ridge,
wave a movement like that of a sudden occurrence or increase in a specified phenomenon; "a wave of settlers"; "troops advancing in waves"
A wavelet is a wave-like oscillation with an amplitude that starts out at zero, increases, and then decreases back to zero. It can typically be visualized as a "brief oscillation" like one might see recorded by a seismograph or heart monitor. Generally, wavelets are purposefully crafted to have specific properties that make them useful for signal processing.
OmegaWiki Dictionary
Ω
wavelet A mathematical function used to divide a given function or continuous-time signal into different frequency components and study each component with a resolution that matches its scale. (source: Wikipedia)
