Definition of pearl mussel in US English:

pearl mussel


  • An elongated freshwater bivalve mollusk which occasionally produces small pearls, found in large rivers of the northern hemisphere.

    Margaritifera margaritifera, family Margaritiferidae

    • ‘His PhD thesis looked at the ecology and conservation of the freshwater pearl mussel in Donegal.’
    • ‘Referring to the suggestions of a threat to the fresh water pearl mussels in the nearby Lickey river, he said the protection of the river has at all times been a consideration for the county council.’
    • ‘Over the three-day event, some 20 specialists gave presentations on a wide range of environmental topics including Dr. Evelyn Moorkens who spoke about the plight of the local Nore pearl mussel which is in imminent danger of extinction.’
    • ‘The River Lickey is a very significant habitat for the shellfish commonly known as the pearl mussel because of the worthless pearls it produces.’
    • ‘The project won the national award for its work in improving the River Licky and helping to preserve a rare fresh water mussel, commonly known as the pearl mussel, which lives in the river.’