Definition: The word "compendium" is a Greek term meaning a comprehensive or systematic treatise on one topic. It comes from the verb "compendi," which means to compose or make up. The term "compendious," in contrast, refers to being extensive and detailed in its scope of coverage. It typically includes a large amount of information, often with specific details or examples that illustrate the main points of the treatise. The word is also used to describe something so comprehensive it becomes difficult to distinguish between different parts. Here are some examples: - The "compendium" of history might discuss major events and figures over several centuries. - The "compendious" biography might cover a person's life from birth up to their death, covering all aspects of their life. In summary, the word "compendium" refers to being extensive, detailed, and encompassing one topic while the term "compendious," on the other hand, emphasizes its breadth and complexity.