資料來源 : Webster's Revised Unabridged Dictionary (1913)

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.