demonstrationern.
/ˌdɛmənˈstreɪʃn̩ə/, U.S. /ˌdɛmənˈstreɪʃənər/ = demonstrator n. (in various senses). In early use: †spec. (depreciative) = demonstrator n. 1a; cf. demonstrationist n. 1 (obsolete). In quots. ?1589 and 1590 apparently referring to John Udall, author of A Demonstration of the Trueth of that Discipline which Christe hath Prescribed (1588).
ΘΚΠ
the mind > attention and judgement > testing > proof, demonstration > [noun] > one who proves
demonstrationer?1589
demonstrator1593
verifier1648
prover1741
demonstrationist1828
substantiator1840
?1589 T. Nashe Almond for Parrat sig. 15 Your olde soaking Demonstrationer, that hath scrapte vp such a deale of Scripture to so lyttle purpose.
1590 Remonstrance i. 2 The Bel-weather of this bande (out of whose forge the Demonstrationer hath taken vp almost all his stuffe on trust).
1824–6 S. T. Coleridge Notebks. (1990) 5158 Demonstrationers and Defencers of Christianity versus Infidels and Assailants.
1872 York Herald 9 Mar. 8/4 No matter what the occasion or excuse, a demonstration can be most easily got up,..and if the day be fine other thousands of people will come to see the demonstrationers.
1899 Jewelers' Circular 1 Nov. 13/3 Last week one of these ‘demonstrationers’ who had met an English delegate at the sessions of the Congress, sold to him a pair of filled spectacles for $20.
1907 Congregationalist & Christian World 16 Feb. 217/1 They're such awful small cups they're just aggravating... I'm going back there and if so be those demonstrationers have changed again I'm going to have another cup of tea.
2005 R. Conquest Dragons of Expectation i. vi. 67 The moral or material criticism to be found among the doubtless well-meaning but uncomprehending demonstrationers.
This entry has been updated (OED Third Edition, March 2014; most recently modified version published online March 2022).
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n.?1589