棘头虫纲; 棘头动物门; 棘头门
Acanthocephala \A*can`tho*ceph"a*la\, n. pl. [NL., from Gr. ? a spine, thorn + ? head.] (Zo["o]l.) A group of intestinal worms, having the proboscis armed with recurved spines.
Acanthocephala n : phylum or class of elongated wormlike parasites that live in the intestines of vertebrates: spiny-headed worms [syn: {phylum Acanthocephala}]