Saint Ulmo's fire

Thesaurus

Noun

1.Saint Ulmo's fire - an electrical discharge accompanied by ionization of surrounding atmospherecorona discharge, corposant, electric glow, Saint Elmo's fire, Saint Elmo's light, Saint Ulmo's light, St. Elmo's fire, coronaarc, electric arc, electric discharge, spark, discharge - electrical conduction through a gas in an applied electric field