Definitions of biotechnology on the Web:

• the branch of molecular biology that studies the use of microorganisms to perform specific industrial processes; "biotechnology produced ...
• the branch of engineering science in which biological science is used to study the relation between workers and their environments
  wordnetweb.princeton.edu/perl/webwn

• Biotechnology is technology based on biology, especially when used in agriculture, food science, and medicine. ...
  en.wikipedia.org/wiki/Biotechnology

• the use of living organisms (especially microorganisms) in industrial, agricultural, medical and other technological applications; the application of the principles and practices of engineering and technology to the life sciences
  en.wiktionary.org/wiki/biotechnology

• is formally defined as the science of using living things, and components of living things, to produce goods and services. It involves manipulating and modifying organisms, often at the molecular level, to create new and practical applications for agriculture, medicine and industry. ...
  smartstate.net/strategy/strategy05_15/glossary.shtm

• The use of living things to make products.
  ehrweb.aaas.org/ehr/books/glossary.html

• Term used to describe the use of any living organisms in industrial and production processes.
  www.aquatext.com/list-b.htm

• the use of biological processes to make products.
  library.thinkquest.org/19037/glossary.html

• The use of living organisms or their products to make or modify a substance. Biotechnology includes recombinant DNA techniques (genetic engineering) and hybridoma technology.
  www.stayinginshape.com/3osfcorp/libv/i23.shtml

• A set of biological techniques developed through basic research and now applied to research and product development. Biotechnology refers to the use of recombinant DNA, cell fusion, and new bioprocessing techniques.
  www.csrees.usda.gov/nea/biotech/res/biotechnology_res_glossary.html

• any technological application that uses biological systems, living organisms, or derivatives thereof, to make or modify products or processes for specific use
  citizenship.yara.com/en/resources/glossary/index.html

• a set of techniques, such as those used to make DNA in laboratories, developed through basic research that are now used by companies to make new drugs.
  www.psoriasis.org/about/glossary/

• is the use of cellular and biomolecular processes to solve problems or make useful products. Cells and biological molecules are specific in their interactions and can therefore target specific problems with fewer side effects.
  www.vpl.ca/bcscienceclusters/glossary.html

• industrial processes that involve the use of biological systems or products (eg, monoclonal antibodies, genetically engineered recombinant proteins).
  www.sfaf.org/custom/glossary.aspx

• Application of biological science information which can lead to the production of commercial products by biologic processes. ...
  www.abbottdiagnostics.com/glossary/index.cfm