This article provides a profound, comprehensive, and systematic analysis of the etymological roots of medical diagnostic terminology in Latin and Greek. Approximately 70–90% of the terms constituting the international language of medicine originate from ancient Greek and Latin, enabling the precise, concise, and universal expression of body organs, pathological processes, functional conditions, diseases, and diagnostic methods. The article extensively discusses the historical development of medical terms (from Hippocrates to modern hybrid terminology), the semantic meanings of prefixes, roots, and suffixes, their interrelations, their application in various fields of diagnostics (laboratory, instrumental, radiological, pathological, and functional diagnostics), clinical examples, the emergence of hybrid terms, the importance of etymological knowledge in medical education and practice, and modern trends. The etymological approach significantly improves students’ understanding and memorization of terminology, reduces clinical errors, and enhances professional thinking.

diagnostic terminology, Latin foundations, Greek-Latin etymology, medical prefixes, roots and suffixes, clinical diagnostics, radiological terminology, pathological terminology, hybrid terms, medical education, etymological analysis.

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