From WordNet (r) 3.0 (2006):
worm
n 1: 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
2: a person who has a nasty or unethical character undeserving
of respect [syn: worm, louse, insect, dirt ball]
3: a software program capable of reproducing itself that can
spread from one computer to the next over a network; "worms
take advantage of automatic file sending and receiving
features found on many computers"
4: screw thread on a gear with the teeth of a worm wheel or rack
v 1: to move in a twisting or contorted motion, (especially when
struggling); "The prisoner writhed in discomfort"; "The
child tried to wriggle free from his aunt's embrace" [syn:
writhe, wrestle, wriggle, worm, squirm, twist]