Worms refers to an obsolete taxon (vermes) used by Carolus Linnaeus and Jean-Baptiste Lamarck for all non-arthropod invertebrate animals, and stems from the Old English word wyrm. Currently it is used to describe many different distantly related animals that typically have a long cylindrical tube-like body and no legs. Most animals called "worms" are invertebrates, with exeption such as some legless lizard species and amphibian caecilians.
Historical English-speaking cultures have used the (now deprecated) terms worm, Wurm, or wyrm to describe carnivorous reptiles ("serpents"), and the related mythical beasts dragons, however, most snakes are not considered worms.
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