volcanian

• Volcanian
• volcanean

Directly from Latin Volcāniānus or from Latin Volcānius + -an within English, from Volcānus + -iānus (“-ian”) or -ius (“-y: forming adjectives”). Equivalent to Volcan +‎ -ian. Doublet of Vulcanian.

volcanian (comparative more volcanian, superlative most volcanian)

1. (geology, obsolete) Synonym of volcanic, of or related to volcanoes and volcanism.
   • 1819, John Keats, “Lamia”, in Lamia, Isabella, the Eve of St. Agnes, and Other Poems, London: […] [Thomas Davison] for Taylor and Hessey, […], published 1820, →OCLC, part I, page 12:

     The colours all inflam'd throughout her train, / She writh'd about, convuls'd with scarlet pain: / A deep volcanian yellow took the place / Of all her milder-mooned body's grace; [...]

2. (geology, historical) Synonym of Vulcanian, of or related to former theories concerning the origin of crystalline minerals to subterranean fires.

• “volcanian”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.