demonstrator

Meaning

Noun

• One who demonstrates anything, or proves beyond doubt.
• The forefinger.
• One who takes part in a demonstration; a protester.
• One who demonstrates products in a retail environment; a merchandiser.
• An item, particularly a vehicle, used in demonstrations to a customer or user.
• An assistant to a lecturer.
• One who teaches anatomy from the dissected parts.

Origin

• demonstrate + -or