Look up in vitro, invitro, or in-vitro in Wiktionary, the free dictionary.

In vitro refers to studies performed with microorganisms, cells, or biological molecules outside their normal biological context.

In vitro may also refer to:

• In vitro fertilization, a process of fertilization where an egg is combined with sperm outside the body
• In Vitro, a fictional genetically engineered subspecies of humans in the science fiction television series Space: Above and Beyond
• In Vitro (journal), a scientific journal