The term for a rodent that has a long body and tail is "rat." Rats are typically larger than mice and belong to the genus Rattus. They are characterized by their long, tapering tails, pointed snouts, and small ears. Common species include the brown rat (Rattus norvegicus) and the black rat (Rattus rattus). Rats are highly adaptable and can thrive in various environments, often living in close proximity to humans. While they can be seen as pests due to their potential to spread disease and cause damage, they also play significant roles in scientific research and ecosystems as scavengers and prey.