demonstrator Meaning, Definition & Usage
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noun a teacher or teacher's assistant who demonstrates the principles that are being taught
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noun someone who demonstrates an article to a prospective buyer
sales demonstrator.
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noun someone who participates in a public display of group feeling
protester.
WordNet
Dem"on*stra`tor noun
Etymology
L.: cf. F.Definitions
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One who demonstrates; one who proves anything with certainty, or establishes it by indubitable evidence. -
(Anat.) A teacher of practical anatomy.