(pathology) Normal tissue (or an organ) present at an abnormal part of the body
(ecology) The occurrence of an organism in a number of different habitats
(philosophy) A type of utopia that actually exists in a society
2002, James W Flanagan, David M Gunn, Paula M McNutt, "Imagining" biblical worldsFor Foucault, heterotopias are not imagined places but real places that almost delete themselves from public consciousness. They are null sites in awareness, yet inevitable and vital to the construction of space.