A professor visiting another college or university to teach for a limited time WordNet 3.0 & Open English WordNet

In academia, a visiting scholar, visiting scientist, visiting researcher, visiting fellow, visiting lecturer, or visiting professor is a scholar from an institution who visits a host university to teach, lecture, or perform research on a topic for which the visitor is valued. Wikipedia

academic rank Wikidata

A scholar from an institution who visits a host university to teach, lecture or perform research on a particular topic. Wiktionary

Scholar from an institution who visits a host university. Wiktionary (translation)