What does the suffix "-logy" refer to?

The suffix "-logy" refers to the study of a particular subject or field. It is derived from the Greek word "logia," which means "study" or "discourse." Therefore, when used at the end of a word, it signifies that the term pertains to a systematic examination or inquiry into a specific area of knowledge. For example, "biology" means the study of life, while "psychology" refers to the study of the mind and behavior. Understanding this suffix helps in the interpretation of numerous scientific and medical terms, allowing for a better grasp of various disciplines within the healthcare field.