St Elmo's fire
/ˈelməʊ/noun
mass noun
- a phenomenon in which a luminous electrical discharge appears on a ship or aircraft during a storm圣爱尔摩火, 电击发光（暴风雨时出现在轮船或飞机上的电晕放电现象）。
词源
regarded as a sign of protection given by St Elmo, the patron saint of sailors.