Inclusion body is a term used in biology to describe dense, compact structures found within the cytoplasm of certain cells or viruses. These bodies can be made up of a variety of substances, including proteins and viral particles, and are often associated with disease or infection. Some synonyms for inclusion body include intracellular aggregate, cytoplasmic granule, and viral inclusion. Other related terms used in biological research include amyloid fibril, protein aggregate, and immune complex. Understanding the properties and behavior of inclusion bodies is important for developing treatments and vaccines for a wide range of diseases and conditions.