What is the appropriate suffix that describes a condition of abnormal growth?

The suffix that describes a condition of abnormal growth is actually "-Iasis." This suffix is used to indicate an abnormal condition, typically related to a disease or the presence of something abnormal in the body. For example, "steatosis" refers to fatty change in tissues, and "lithiasis" indicates the presence of stones in the body.

The suffix "-Pathy" generally refers to disease, and while it can suggest a malfunction, it does not specifically denote abnormal growth. "-Cide" indicates killing, as in "pesticide," which is unrelated to growth conditions. Meanwhile, "-Genic" refers to something that produces or causes, but again, it does not specifically focus on abnormal growth conditions.

In summary, the most fitting suffix for describing abnormal growth is "-Iasis," specifically tailored to denote a pathological state or condition.