Volcanic

google

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late 18th century: from French volcanique, from volcan (see volcano).

wiktionary

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From French volcanique, from volcan(“volcano”); and/or directly from volcan(o) +‎ -ic.

etymonline

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volcanic (adj.)

1774, from French volcanique, from Italian vulcanico, from vulcano (see volcano). Figurative sense of "prone to explosive activity" is attested from 1854.