Final answer:
The combining form "gnos/o-" in the medical term "diagnosis" means knowledge. It is derived from the Greek word "gnosis," which means knowledge or understanding. "Gnos/o-" is used to describe the act of identifying or recognizing a disease or condition through observation and examination.
Step-by-step explanation:
In the medical word "diagnosis," the combining form "gnos/o-" means knowledge. The combining form "gnos/o-" is derived from the Greek word "gnosis," which means knowledge or understanding. When used in medical terms, "gnos/o-" is usually associated with the act of identifying or recognizing a disease or condition through observation, examination, and analysis.