any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae | any animal lacking a backbone or notochord; the term is not used as a scientific classification |
screw thread on a gear with the teeth of a worm wheel or rack | |
a software program capable of reproducing itself that can spread from one computer to the next over a network | |
a person who has a nasty or unethical character undeserving of respect | |