n. A freshwater fish, Coregonus pollan, resembling a herring
the GNU version of the Collaborative International Dictionary of English
n. A lake whitefish (Coregonus pollan), native of Ireland. In appearance it resembles a herring.
The Century Dictionary and Cyclopedia
n. The so-called fresh-water herring of Ireland, a variety of whitefish technically known as Coregonus pollan, found in the various loughs. The corresponding variety of the Scotch lochs is called powan and vendace. See Coregonus and whitefish.