docent

Instructive; that teaches.

A teacher or lecturer at some universities (in central Europe, etc.)

• Near-synonyms: preceptor, professor, associate professor, assistant professor
• The docent is available for office hours and can help to connect students with tutors.

A tour guide at a museum, art gallery, historical site, etc.US

• The docent greeted the visitors and welcomed them to the Smithsonian.