Denys tuberculin, also known as tuberculinum denys, is a substance commonly used in the medical field as a diagnostic tool for tuberculosis. However, there are several synonyms for this term that are worth mentioning. One of them is "tuberculin test", which refers to the process of injecting the substance into the skin to evaluate if the patient has been exposed to tuberculosis. Another synonym is "Mantoux test", named after the French physician Charles Mantoux, who developed a refined version of the tuberculin test. Lastly, "tuberculin skin test" is also a widely used term to describe the application of denys tuberculin on the skin to assess for tuberculosis infection.