English
ghostology
From ghost + -ology.
Formed from ghost + -ology
Proto-Indo-European *ǵʰéysd-
…
Proto-Germanic *gaistaz ‘terror’
Proto-West Germanic *gaist ‘ghost’
Old English gāst ‘breath’
Middle English gost ‘a spiritual being’
English ghost
Today it means
noun The knowledge or study of ghosts or spirits; the science of the supernatural; spiritism.
Language periods are conventional ranges, not dates for this word.
Etymograph / ghostology