Robot spider 

A spider with robot parts added. A spider cyborg if you will.

It is NOT however, a Spider robot, see Spider robot

"Wow, look at that cool spider robot!"

"No, thats a robot spider."

Robot spider by Dreamparacite May 10, 2005

Spider robot 

A robot based off the look of a spider. It has eight legs like a normal one would.

It is NOT a robot spider though, see Robot spider

"Check out the robot spider I killed!"

"Thats a spider robot idiot..."

Spider robot by Dreamparacite May 10, 2005