English
alienologist
From alien + -ologist.
Formed from alien + -ologist
Proto-Indo-European *h₂el- ‘beyond, other’
…
Latin alius ‘other’
Latin aliēnus ‘belonging to someone else”, later “exotic,…’
Old French alien
Middle English alien ‘an outsider or foreign person, especially if…’
English alien
Today it means
noun someone who studies aliens
Language periods are conventional ranges, not dates for this word.
Etymograph / alienologist