Definition of Metazoa in English:


plural noun

  • 1A major division of the animal kingdom that comprises all animals other than protozoans and sponges. They are multicellular animals with differentiated tissues.

    • ‘Belt desmosomes are the constituent character of the Epitheliazoa, the next higher taxon above the Porifera within the Metazoa, comprising the taxa Placozoa and Eumetazoa.’
    • ‘Now, based on the study with protein molecules, Fungi are regarded as the nearest-neighbor kingdom of the Metazoa, a conclusion which is supported by others.’
    • ‘Not only Metazoa, but other multicellular clades such as Fungii and Metaphyta, must also be organized so that their basic body parts-differentiated cell types-are assembled into a hierarchy of functional associations.’
    • ‘However, their importance in elucidating the phylogeny of the Metazoa, particularly the arthropods, has recently increased interest in this group.’
    • ‘After analyzing protein sequences from sponges, especially those which comprise receptors, it was established that all Metazoa, including Porifera, are of monophyletic origin.’
    1. 1.1Animals of the Metazoa division.
      • ‘These results suggest that insulin-like genes have coevolved with the appearance of the metazoa (multicellular animals with differentiated tissues).’
      • ‘Consider the possibility that the destruction of the Drosophila model will prove generally true, if not for all organisms perhaps, then at least for metazoa.’
      • ‘Thanks to the extensive use of recombinant DNA cloning techniques within the past decade, it is now established that the insulin gene superfamily is represented in all metazoa.’
      • ‘Multicellular animals, or Metazoa, appear in the fossil records between 575 and 509 million years ago.’
      • ‘Cnidarians may be informative about body plan evolution in the metazoa both because of what they share with bilaterians and what they lack.’


Modern Latin (plural), from meta- (expressing change) + Greek zōia (plural of zōion animal).