noun
guest lecturer; visiting teacher
Refers to a faculty member who is invited from another institution to teach or lecture temporarily. Often used in university contexts.
彼は今年、客員教員としてこの大学で教えている。
He is teaching at this university this year as a visiting lecturer.
Compound of 客員 (guest member) and 教員 (teacher/faculty). The exact historical derivation is uncertain, but the term is a straightforward modern academic title.