Definition: Amgen is a company that specializes in biotech research, development, and commercialization. The term "Amgen" originates from the initials of Amgen Inc., which was founded in 1906 by William G. Amgen. It's the name of the American pharmaceutical company with offices in San Diego, California. The definition of "Amgen" is a name given to a company that specializes in biotechnology research and development activities, particularly related to drugs for human diseases. The term "amgen" is used to identify pharmaceutical companies which are known for their research and development activities focused on developing new medicines.