n.any of various worms living parasitically in intestines of vertebrates having a retractile proboscis covered with many hooked spines

同義詞：spiny-headed worm

1. Acanthocephalans are known for their spiny proboscis, which they use to anchor themselves to the host's intestinal wall.
   棘頭蟲以其帶刺的吻部而聞名，它們用此來固定在宿主的腸壁上。
2. The life cycle of an acanthocephalan involves multiple hosts, typically including an invertebrate and a vertebrate.
   棘頭蟲的生命周期涉及多個(gè)宿主，通常包括無脊椎動(dòng)物和脊椎動(dòng)物。