The term "class Trematoda" refers to a group of organisms known as parasitic flatworms, which include creatures called flukes. These worms belong to a larger category of animals called "flatworms" and are known for living inside other animals, often causing disease.
In advanced discussions, you might encounter terms related to the life cycle of Trematoda, such as "metacercaria" (a stage in their development) or "definitive host" (the host in which the adult worm lives).
Understanding "class Trematoda" is important in fields like biology, medicine, and environmental science.