Term: logos / Λόγος
Origin: Anc Greek λόγος> λέω/leo (=speak).
Coined with a special meaning by pre –Socratic Greek philosopher Heraclitus (c. 535–c. 475 BCE).
Ancient philosophers used the term to mean discourse (Aristotele) or as principle of universe (cosmos).
Runon derivatives :
Suffix -logy indicating branch of knowledge or study of :
Pathology, oncology, epidemiology, endocrinology, embryology, cytology, immunology, histology, microbiology, biology, pharmacology, toxicology, cardiology, hepatology, haematology, nephrology, pulmonology, rheumatology, gastroenterology, physiology, urology