myrmekite
/ˈməːmɪkʌɪt/(also myrmecite) Geology
noun
An intergrowth of plagioclase containing drops or wormlike forms of quartz.
Origin
Early 20th century; earliest use found in Science. From German Myrmekit from ancient Greek μυρμηκιά anthill, wart (from μυρμηκ-, μύρμηξ ant + -ία) + German -it.