Any of numerous small parasitic nematode worms of the family Ancylostomatidae, having hooked mouthparts with which they fasten themselves to the intestinal walls of various hosts, including human beings, causing ancylostomiasis.

• 钩虫钩虫属的大量小的寄生线虫，嘴部有倒刺，可以固定于寄主内脏壁上（包括人类），能引起钩虫病