ἀπόκυνον
From LSJ
τὸ γὰρ βραχύ τι τοῦτο πᾶσαν ὑμῶν ἔχει τὴν βεβαίωσιν καὶ πεῖραν τῆς γνώμης → this trifle contains the whole seal and trial of your resolution
English (LSJ)
τό, (κύων)
A dog's-bane, Marsdenia erecta, Dsc.4.80, Gal. 11.835. II name of a poisoned cake for dogs, Hsch.
German (Pape)
[Seite 309] τό, Hundetod, eine Pflanze, Diosc., cynanehum erectum, Linn.