What are the definitions of the following terms: etiology, symptom of disease, sign of disease, diagnosis, prognosis, and pathogenesis? What are the major categories of diagnostic tests and procedures...

What are the definitions of the following terms: etiology, symptom of disease, sign of disease, diagnosis, prognosis, and pathogenesis?

What are the major categories of diagnostic tests and procedures that can help the practitioner make a diagnosis? Give some examples.