An assistant to a lecturer.
The forefinger.
One who demonstrates anything, or proves beyond doubt.
An item, particularly a vehicle, used in demonstrations to a customer or user.
One who demonstrates products in a retail environment; a merchandiser.
One who teaches anatomy from the dissected parts.
One who takes part in a demonstration; a protester.
A person who trains another; a coach.
A person responsible for treating injuries sustained by players during matches; a physiotherapist.
A patch for a video game that applies cheats.
A running shoe or sneaker.
A piece of indoor equipment allowing a bicycle to be ridden while stationary.