What does the suffix "-osis" signify?

The suffix "-osis" is used in medical terminology to denote an abnormal condition, typically a pathological state or disease process. It indicates that there is some form of alteration from the normal state of health, often related to a morbid or diseased condition. For instance, in the term "fibrosis," the suffix "-osis" signifies an abnormal condition characterized by the formation of fibrous tissue, highlighting a deviation from normal tissue function.

In contrast, the other options do not accurately reflect the meaning of "-osis." "Normal function" would not incorporate the concept of abnormality that "-osis" implies. A "procedure" is indicated by different suffixes that denote actions taken in a clinical or surgical context. Likewise, "theory" would not be related to the medical conditions described by "osis." Therefore, the identification of "-osis" as signifying an abnormal condition is essential for understanding various medical terms related to diseases and health issues.