Obsidional

• (a.) Of or pertaining to a siege.
Found on http://thinkexist.com/dictionary/meaning/obsidional/

Obsidional

Ob·sid'i·o·nal adjective [ Latin obsidionalis , from obsidio a siege, obsidere to besiege: confer French obsidional . See Obsess .] Of or pertaining to a siege. Obsidional crown (Rom.Antiq.) , a crown bestowed upon a general who raised the sie...
Found on http://www.encyclo.co.uk/webster/O/5

obsidional

of, like or pertaining to a siege
Found on http://phrontistery.info/o.html
No exact match found