Biotechnology is defined as

Biotechnology in its basic form has existed for thousands of years, dating back to an era when humans first learned to produce bread, beer, and wine using the natural process of fermentation.

Biotechnology is best known for its role in medicine and pharmaceuticals, but the science is also applied in other areas such as genomics, food production, and the production of biofuels.
Biotechnology is the branch of applied science that uses living organisms and their derivatives to produce products and processes.