demonstrator

demonstrate +‎ -or

• (UK) IPA^(key): /ˈdɛmənstɹeɪtə(ɹ)/

demonstrator (plural demonstrators)

1. One who demonstrates anything, or proves beyond doubt.
2. The forefinger.
3. One who takes part in a demonstration; a protester.
4. One who demonstrates products in a retail environment; a merchandiser.
5. An item, particularly a vehicle, used in demonstrations to a customer or user.
   • 2006, Ellie Lewis, Promoting the Health and Well-being of Young People in Supported Housing (page 56)

     Young people have been involved in choosing which resources and educational toys are used to deliver sex and relationship education – including leaflets, videos and condom demonstrators.

6. An assistant to a lecturer.
7. One who teaches anatomy from the dissected parts.

• See Thesaurus:index finger

dēmōnstrātor

1. second-person singular future passive imperative of dēmōnstrō  "thou shalt be shown; thou shalt be proven"
2. third-person singular future passive imperative of dēmōnstrō  "it shall be shown; it shall be proven"

• demonstrator in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• demonstrator in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• demonstrator in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette