Etymology
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Elmo

in St. Elmo's Fire "corposant," name given by seamen to the brushes and jets of electric light seen on the tips of masts and yard-arms, especially in storms, 1560s, from Italian fuoco di Sant'Elmo, named for the patron saint of Mediterranean sailors, a corruption of the name of St. Erasmus, an Italian bishop said to have been martyred in 303 who was invoked in the Mediterranean by sailors during storms.

updated on November 19, 2021

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