Yep, that's it Egg.
Dreadnoughts were first mentioned in Zahn's Dark Force Rising c. 1992. And if we're going to start pointing fingers and declaring rip-offs, we could start comparing the 1978 Battlestar everyone's forgotten about with Imperial Star Destroyers. Indeed, the whole reason Battlestar got off the ground in the firstplace was because Star Wars was big and everyone wanted their own version.... including Television.