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The Collaborative International Dictionary
Anatreptic

Anatreptic \An`a*trep"tic\, a. [overturning, fr. ? to turn up or over; ? + ? too turn.] Overthrowing; defeating; -- applied to Plato's refutative dialogues.
--Enfield. [1913 Webster] ||

Wiktionary
anatreptic

a. rebutting; overthrowing; defeating; applied to Plato's refutative dialogues.