Stealth cruiser

"What class ship was he fighting?" "Mostly cruiser-to-cruiser. Nothing as small as your ship." "Well, no ship this small usually has a cloaking device."

- Anakin Skywalker and Obi-Wan Kenobi discussing Trench's history with cloaked warships.

A stealth cruiser was a capital ship during the later years of the Galactic Republic fitted with a cloaking device.

History
The notorious Separatist Admiral Trench fought such cruisers several times, beating them with magnetic torpedoes.