In-vitro meat is animal flesh that has never been part of a complete, living animal. As of May 2003, some scientists are experimentally growing in vitro meat in laboratories, but no meat has been produced yet for public consumption. Potentially, any animal could be a source of cells for in-vitro meat. (Wikipedia)
"In-Vitro meat is the manufacturing of meat products through 'tissue-engineering' technology. Cultured meat (= in-vitro meat) could have financial, health, environmental, and animal welfare advantages over traditional meat. The idea: To produce animal meat, simply without using an animal. Starting cells are taken painlessly from live animals, they are put into a culture media where they start to proliferate and grow, independently from the animal."