Aged Romulan was a material option, an Alpha Quadrant Alliance designation for the visual appearance of a spacecraft's outer hull, i.e. a vessel's "skin". Aged Romulan was available for some light warbird classes of the Romulan Republic and its Romulan Republican Force. Aged Romulan put the ship in a uniform, grayish white cover. The warp plasma in the nacelles appeared white. (STO - "From the Ashes" mission: "Explore the Flotilla")
Related ship classes are sorted together, rather than alphabetically.