Acanthocephala Acanthocephala /əˌkænθoʊˈsɛfələ/

noun

1. Phylum or class of elongated wormlike parasites that live in the intestines of vertebrates: spiny-headed worms  ( Acanthocephala , phylum Acanthocephala )
   phylum or class of elongated wormlike parasites that live in the intestines of vertebrates: spiny-headed worms