myokymia
/ˌmʌɪə(ʊ)ˈkʌɪmɪə/Medicine
noun
Involuntary twitching or rippling of one or more muscles.
Origin
Early 20th century; earliest use found in Journal of Nervous and Mental Disease. From myo- + ancient Greek κῦμα wave + -ia, after German Myokymie.