ripple

nouns

a small wave on the surface of a liquid
(electronics) an oscillation of small amplitude imposed on top of a steady value
domain category
the branch of physics that deals with the emission and effects of electrons and with the use of electronic devices
is a type of (narrower)
(physics) a regular periodic variation in value about a mean

verbs

stir up (water) so as to form ripples
is derived from
flow in an irregular current with a bubbling noise
"babbling brooks"