Real Dictionary

biotechnology
(in industry) the technique of using microorganisms, such as bacteria, to perform chemical processing, such as waste recycling, or to produce other materials, such as beer and wine, cheese, antibiotics, and (using genetic engineering) hormones, vaccines,
the act of applying to a particular purpose or use [...]
uncountable noun: Biotechnology is the use of living parts such as cells or bacteria in industry and technology.

biotechnology in American English
the use of the data and techniques of engineering and technology for the study and solution of problems concerning living organisms
noun: the use of living organisms or other biological systems in the manufacture of drugs or other products or for environmental management, as in waste recycling: includes the use of bioreactors in manufacturing, microorganisms to degrade oil slicks or organic

biotechnology in British English
noun: (in industry) the technique of using microorganisms, such as bacteria, to perform chemical processing, such as waste recycling, or to produce other materials, such as beer and wine, cheese, antibiotics, and (using genetic engineering) hormones, vaccines,