Formal:
* Demonstrator-lecturer: Emphasizes both roles equally.
* Demonstrative lecturer: Focuses on the lecturer's ability to demonstrate.
* Lecture-demonstrator: Emphasizes the demonstrative aspect within a lecture.
Informal:
* Demo-lecturer: Short and catchy.
* Lec-demo: Short and casual.
More Descriptive:
* Interactive lecturer: Highlights the engagement of the audience.
* Hands-on instructor: Emphasizes the practical aspect.
* Visual demonstrator: Focuses on the use of visual aids.
The best option will depend on the specific context and desired tone.