acanthocephalan

Definitions of acanthocephalan
  1. noun
    any of various worms living parasitically in intestines of vertebrates having a retractile proboscis covered with many hooked spines
    synonyms: spiny-headed worm
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    type of:
    worm
    any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae
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