Kelvin–Helmholtz
/ˌkɛlvɪnˈhɛlmhɒlts/ /ˌkɛlvɪnˈhɛlmhəʊlts/Physics
noun
Attributive Designating the instability of an interface between two fluids in relative motion, and associated phenomena.
Origin
1940s; earliest use found in Journal Marine Research. From the title of Lord Kelvin + the name of H. L. F. von Helmholtz.