I was doing the quest 'The Staff of Magnus' when I encountered a Draugr Deathlord, in the middle of the fight I was notified that he had disarmed me, I simply switched to a different weapon (assuming I'd get my other weapon back). I killed him but now my Wuuthrad is gone. I love my Wuuthrad and really want it back.
P.S I overwrighted an older save while in battle after he disarmed me, so I can't simply go back and fight him again and hope he doesn't disarm me.

The weapon should be on the ground where he disarmed you.
It may be a bit hard to find, but its not gone, it should have fallen to the floor.

Confirming Merari's statement.

The first time I was disarmed, Lydia picked up the weapon.

Barring the possibility that it fell through the ground and is lost to the void; it should be where you were disarmed. :laugh:

Thanks guys, turned out it was on the ground. I just didn't look hard enough the first time.

I hate that shout with a firey passion. I don't mind having to switch weapons, but I've spent 15-20 minutes looking for a black sword in a black room surrounded by black junk.

I remember this fight where I was disarmed with about 1/4 health left, both me and the boss.Since I was Khajiit I just went "screw that" and finished him off with punches.

Was epic.