What is the name for a warm bath in Roman baths?

The term for a warm bath in Roman baths is "Caldarium." This area was specifically designed for hot baths, often featuring heated floors and steam, which provided a therapeutic bathing experience. In a typical Roman bath complex, the Caldarium was an essential component, situated between the Frigidarium (cold bath) and the Tepidarium (warm bath), which served a different purpose.

The Frigidarium is characterized by its cold water baths, utilized after the hot baths to refresh the body. The Tepidarium is the room with warm water baths, meant for relaxation and to prepare the body for the hot Caldarium. The Natatio refers to the swimming pool area, further demonstrating the distinct functions of each space within the Roman bath complex.

Understanding the specific purposes of these various rooms helps clarify why the Caldarium is the correct answer, as it is the one specifically designated for warm baths.