ETYM Old Eng. worm, wurm, AS. wyrm.
Any of various elongated limbless invertebrates belonging to several phyla. Worms include the flatworms, such as flukes and tapeworms; the roundworms or nematodes, such as the eelworm and the hookworm; the marine ribbon worms or nemerteans; and the segmented worms or annelids.
In 1979, giant sea worms about 3 m/10 ft long, living within tubes created by their own excretions, were discovered in hydrothermal vents 2,450 m/8,000 ft beneath the Pacific NE of the Galápagos Islands.
1. Any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida, Chaetognatha, Nematoda, Nemertea and Platyhelminthes; also many insect larvae.
2. Has a nasty or unethical character undeserving of respect; SYN. louse, insect, dirt ball.
3. Threads gear with the teeth of a worm wheel or rack.