1) Aetiologist 2) Etiologist 3) Florey 4) Internist 5) Landsteiner 6) Paget 7) Pathologist 8) Rous 9) Virchow 1) Medical specialist 2) Pathologist 3) Specialist 
One who is skilled in making diagnoses; formerly, a name for specialists in internal medicine. ... (05 Mar 2000) ... 
(di″әg-nos-tish´әn) an expert in diagnosis.
Type: Term Pronunciation: dī′ag-nos-tish′ăn Definitions: 1. One who is skilled in making diagnoses; formerly, a name for specialists in internal medicine.
[n] - a doctor who specializes in medical diagnosis
diagnostician 1. A person who diagnoses, especially a physician specializing in medical diagnostics. 2. An expert in making diagnoses; especially, a medical doctor. 3. Someone with special skills in identifying the cause or nature of a problem even in areas other than medical.
pathologist noun a doctor who specializes in medical diagnosis
an expert in making diagnoses, esp. a medical doctor.