entelechy
noun
en·tel·e·chy en-ˈte-lə-kē 
in-
plural entelechies
1
: the actualization of form-giving cause as contrasted with potential existence
2
: a hypothetical agency not demonstrable by scientific methods that in some vitalist doctrines is considered an inherent regulating and directing force in the development and functioning of an organism
Word History
Etymology
Late Latin entelechia, from Greek entelecheia, from entelēs complete (from en- en- entry 2 + telos end) + echein to have — more at telos, scheme entry 1
First Known Use
1593, in the meaning defined at sense 1