OBSIDIONAL

Ob‐sid″i‐o‐nal (?), a. [[L. obsidionalis, from obsidio a siege, obsidere to besiege: cf. F. obsidional. See Obsess.]] Of or pertaining to a siege. Obsidional crown (Rom. Antiq.), a crown bestowed upon a general who raised the siege of a beleaguered place, or upon one who held out against a siege.