demonstrator

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

noun a teacher or teacher's assistant who demonstrates the principles that are being taught
noun someone who demonstrates an article to a prospective buyer
noun someone who participates in a public display of group feeling

From demonstrate + -or.

"They are my--my Demonstrators," she said. — Fairy Prince and Other Stories, Eleanor Hallowell Abbott
There’s stories, too, about his demonstrator, Capes Something or other. — Ann Veronica: A Modern Love Story, H. G. (Herbert George) Wells
It was in the rooms of Mr. Jacoby Wace, Assistant Demonstrator at St. Catherine's Hospital, Westbourne Street. — Tales of Space and Time, H. G. (Herbert George) Wells

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