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.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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