Definition of vulcanist in US English:

vulcanist

noun

  • Geology. Also with capital initial. = volcanist. Now chiefly historical.

adjective

  • Geology. Of, relating to, or advocating vulcanism. Now historical.

Origin

Late 16th century (in an earlier sense). From Vulcan + -ist.

Pronunciation

vulcanist

/ˈvʌlkənɪst/