n. A fish, the Eurasian ruffe (Gymnocephalus cernuus) and other species in the same genus.
The Century Dictionary and Cyclopedia
n. An obsolete form of roughie.
Word Usage
"For example, in Loch Lomond in Scotland the invasive ruffe (Gymnocephalus cernuus) eats the eggs of an arctic relict species, the powan (Coregonus lavaretus), thereby threatening this species in one of its only British habitats [66]."