crawler

noun

1. A child who is able to creep using its hands and knees but is not able to walk.
2. A crawl swimmer.
3. A tractor crawler, a motorized vehicle that uses caterpillar tracks instead of wheels.
4. A software bot that autonomously follows connected paths such as links between web pages.
5. A mobile stage in the development of stationary hemipteran insects such as scale insects—generally the first instar.
6. A cab that is driven slowly along while its driver looks out for a fare.
7. Synonym of crawler crane.
8. A person who is abused, physically or verbally, and returns to the abuser a supplicant.
9. A sycophant.