obsidional adjective. [ǝb'sɪdɪǝn(ǝ)l] LME.
[Latin obsidionalis, from obsidio(n-) siege, from obsidere: see OBSESS, -AL¹.]
Of or pertaining to a siege.
obsidional coin a coin struck in a besieged city when current coins are unobtainable. obsidional crown, obsidional coronet, etc., a wreath of grass or weeds conferred as a mark of honour upon a Roman general who raised a siege.

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