This is the 1985th most frequent Dutch word.
bezoekende
"Bezoekende" means "visiting" or "visitor" (depending on context).
Here, 'bezoekende' is used as an adjective to describe 'students', meaning they are currently visiting.
De bezoekende studenten zijn geïnteresseerd in de cultuur.
The visiting students are interested in the culture.
In this sentence, 'bezoekende' acts as an adjective to indicate that the 'group' is visiting the location.
Ik zie de bezoekende groep bij het museum.
I see the visiting group at the museum.
Here, 'bezoekende' is an adjective modifying 'professor', specifying that the professor is in the process of visiting.