Originally posted by Geoff: In my youth I saw vulcanology used to describe the study of volcanoes, but lately that spelling isn't recognized as proper. Do others use the "u" spelling, or am I the last one?
How else could it possibly be spelled? I’m with you, Geoff.
Vulcan (later vulcano) is an obsolete word for volcano (OED Online, attested from c1400), apparently named after Vulcan, the Roman god of fire and metalworking. The first known use of volcano was 1665 (M-W). Volcanology came out much later (attested from 1800) and vulcanology later still (attested from 1859). You’ll still see words like vulcano, vulcanic, and volcanology. Try not to let it upset you.