Teaching staff have different titles. There are Professors, Readers, Senior Lecturers, Lecturers, Teaching Fellows, Research Fellows and Teaching Assistants. All except Research fellows are involved in teaching, and you'll almost certainly meet every kind in your first year.
Each course is run by a Course Convener, or Course Coordinator (different names for same role), while lectures are usually given by different members of the Course Team. Tutorials are led by Course Tutors, who are either full-time members of staff, or fully qualified Teaching Assistants, usually working for a postgraduate degree.
The names of all the people teaching you will be provided in the course documentation which will be available on MyAberdeen, the University of Aberdeen’s virtual learning environment, from the start of Freshers' week.