Which suffix indicates a condition in medical terms?

The suffix that indicates a condition in medical terms is "osis." In medical terminology, “osis” is often used to refer to a state or condition, usually one that is abnormal or pathological. For instance, "nephrosis" refers to a kidney condition, and "sclerosis" describes a hardening condition of tissues. The use of "osis" typically signifies that there is some form of disease or disorder present, making it a clear indicator of a condition.

The other suffixes have different meanings: "itis" refers to inflammation, as seen in terms like “arthritis,” which means inflammation of the joints. "Algia" denotes pain, as seen in “neuralgia,” which refers to nerve pain. "Ectomy" indicates surgical removal, as found in "appendectomy," which means the surgical removal of the appendix. Each of these suffixes serves a distinct purpose in medical terminology, but "osis" is specifically associated with a condition or abnormality.