crawler

noun9

1. •
   A child who is able to creep using its hands and knees but is not able to walk.
2. •
   (Internet) A software bot that autonomously follows connected paths such as links between web pages.

   • Crawler-based search engines have three major elements. The first is the spider, also called the crawler, which visits a web page, reads it, and then follows links to other pages within the site. — 2008
3. •
   A tractor crawler, a motorized vehicle that uses caterpillar tracks instead of wheels.
4. •
   Synonym of crawler crane.
5. •
   (UK, slang) A sycophant.
6. •
   A crawl swimmer.
7. •
   A mobile stage in the development of stationary hemipteran insects such as scale insects—generally the first instar.
8. •
   (Australia, no longer used) A person who is abused, physically or verbally, and returns to the abuser a supplicant.
9. •
   (slang, no longer used) A cab that is driven slowly along while its driver looks out for a fare.

   • MATERIALS required: Two hanks of crepe or plain silk (this amount makes sleeves, also directions for which are given, though the crawler in the photograph is sleeveless); […] — 1930