Capillary wave

From Glossary of Meteorology
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capillary wave

(Also called ripple, capillary ripple.) A wave for which the primary restoring force is surface tension; generally taken to be one of less than 1.7-cm wavelength, this being the wavelength for which the theoretical phase speed is a minimum, and marking the transition from gravity to surface tension as the dominant restoring force at the sea surface.
Compare gravity wave.