In vitro is a term that refers to a process or experiment that is performed outside of a living organism or natural environment. Some synonyms for the term in vitro include laboratory-based, artificial, outside the body, and cultured. Other related terms include ex vivo, which refers to experiments performed on tissue outside of the body but still in a living state, and in silico, a term used in computer simulations and modeling. These various synonyms and related terms are commonly used in scientific research across fields such as biology, medicine, and chemistry.