vermiform

/ˈvɜːrmɪfɔːrm/
adjective
  1. Shaped like a worm; long, slender, and cylindrical.
    • The biologist described the vermiform shape of the parasite under the microscope.
    • Some caterpillars have a vermiform body that helps them burrow into the soil.
    • The appendix is a small vermiform organ attached to the large intestine.
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