MedicineNet, Medical Definition of Preclinical study, 201-03-29 ([Internet, 2021-08-31](https://www.medicinenet.com/preclinical_study/definition.htm))
Preclinical study: A study to test a drug, a procedure, or another medical treatment in animals. The aim of a preclinical study is to collect data in support of the safety of the new treatment. Preclinical studies are required before clinical trials in humans can be started.