The way a dynamic and complex system issensitive to initial conditions that over timr may have a large effect. Comes from the idea that a butterfly flutering here will cause a tornado over there. Used in chaos theory.

BUTTERFLY EFFECT: "The butterfly effect starts of small but can end up being very large."
Cite this page: N., Pam M.S., "BUTTERFLY EFFECT," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/butterfly-effect-2/ (accessed July 6, 2020).