fulgur
Fulgur is a Latin noun meaning lightning or thunderbolt. In classical texts it referred to a bolt of lightning and could be used metaphorically to convey sudden impact or brightness. The root appears in various scientific and scholarly terms in English, often retaining a sense related to brightness, flash, or ignition.
In geology and materials science, the term fulgur appears in the name fulgurite, a natural glass formed
In medicine and related fields, fulguration is the process of destroying tissue by electric current or laser
In general usage, fulgur survives mainly in technical, literary, or historical contexts as a classical toponymic