Define worms?

Worms are elongated, soft-bodied invertebrates that belong to the phylum Annelida or the phylum Nematoda. They typically have long, cylindrical bodies with no limbs and move by contracting and expanding their muscles. Worms play important roles in ecosystems as decomposers, aerating soil, and serving as a food source for other animals. Some common types of worms include earthworms, roundworms, and flatworms.