Demonstrator

n.	1.	One who demonstrates;
	2.	(Anat.) A teacher of practical anatomy.
	3.	a person who participates in a demonstration{7}.

Noun	1.	demonstrator - a teacher or teacher's assistant who demonstrates the principles that are being taught
	2.	demonstrator - someone who demonstrates an article to a prospective buyer Synonyms: sales demonstrator
	3.	demonstrator - someone who participates in a public display of group feeling Synonyms: protester

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