1. any of various worms living parasitically in intestines of vertebrates having a retractile proboscis covered with many hooked spines; [syn: acanthocephalan, spiny-headed worm]
WordNet (r) 3.0 (2006):
spiny-headed worm
n 1: any of various worms living parasitically in intestines of
vertebrates having a retractile proboscis covered with many
hooked spines [syn: acanthocephalan, spiny-headed worm]