any of various devices or systems used to grow large quantities of biochemical cultures, as to produce enzymes, antibiotics, or blood cells
See bioreactor in American Heritage Dictionary 4
(bīˈō-rē-ăkˌtər)
noun
An apparatus, such as a large fermentation chamber, for growing organisms such as bacteria or yeast that are used in the biotechnological production of substances such as pharmaceuticals, antibodies, or vaccines, or for the bioconversion of organic waste.