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The '''Chimera''' or '''Chimaera''' (pronounced keye-MIR-uh) was "a fire-breathing she-monster in [[Greek mythology]] having a lion's head, a goat's body, and a serpent's tail."<ref>http://mw1.merriam-webster.com/dictionary/chimera</ref>  The monster was slain by Bellerophon, riding the winged horse, Pegasus.

The '''Chimera''' or '''Chimaera''' (pronounced keye-MIR-uh) was "a fire-breathing she-monster in [[Greek mythology]] having a lion's head, a goat's body, and a serpent's tail."<ref>http://mw1.merriam-webster.com/dictionary/chimera</ref>  The monster was slain by Bellerophon, riding the winged horse, Pegasus.

The term has multiple uses in modern [[biology]]. One prominent definition is an animal that has multiple different populations of genetically distinct [[cell]]s that originated from different [[zygotes]]. Some humans are naturally chimeric, sharing cells from a twin (often one that was never born) or a parent.<ref>http://www.theage.com.au/cgi-bin/common/popupPrintArticle.pl?path=/articles/2003/11/27/1069825920727.html </ref>

The term has multiple uses in modern [[biology]]. One prominent definition is an animal that has multiple different populations of genetically distinct [[cell]]s that originated from different [[zygote]]s. Some humans are naturally chimeric, sharing cells from a twin (often one that was never born) or a parent.<ref>http://www.theage.com.au/cgi-bin/common/popupPrintArticle.pl?path=/articles/2003/11/27/1069825920727.html </ref>

In popular usage, a chimera means something deliberately created with a combination of human and animal [[cell]]s.  Such combination is often opposed on [[religious]] and [[ethical]] grounds. Some [[Catholic]] bishops have argued that such [[embryo]]s should not be created but should be brought to term if created in contrast to proposed legislation in [[Great Britain]] which would allow both the creation of chimeras and outlaw the implantation of a chimera once created.<ref>http://blog.wired.com/wiredscience/2007/06/uk-catholic-bis.html </ref><ref>http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2007/06/26/nchimera126.xml </ref>

In popular usage, a chimera means something deliberately created with a combination of human and animal [[cell]]s.  Such combination is often opposed on [[religious]] and [[ethical]] grounds. Some [[Catholic]] bishops have argued that such [[embryo]]s should not be created but should be brought to term if created in contrast to proposed legislation in [[Great Britain]] which would allow both the creation of chimeras and outlaw the implantation of a chimera once created.<ref>http://blog.wired.com/wiredscience/2007/06/uk-catholic-bis.html </ref><ref>http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2007/06/26/nchimera126.xml </ref>