Definition of Trematoda in US English:


plural noun

  • A class of flatworms that comprises those flukes that are internal parasites. The monogenean flukes are sometimes also placed in this class.

    See fluke (sense 1) and digenean
    • ‘The Trematoda, or flukes, are all parasitic, and have complex life cycles specialized for parasitism in animal tissues.’
    • ‘Surprisingly, we found it in a highly conserved form also in a human parasite Schistosoma japonicum (Trematoda).’
    • ‘Coregonus hoyi is heavily parasitized, with common parasites including: Botriochocephalidae, Nematoda, Trematoda, Cestoda, Acanthocephala.’
    • ‘The medically important flatworms are further divided into the flukes (Trematoda) and tapeworms (Cestoda).’


Modern Latin (plural), from Greek trēmatōdēs ‘perforated’, from trēma ‘hole’.