“MALCOLM: You see? The tyrannosaur doesn’t obey set patterns or park schedules. The essence of Chaos.
ELLIE: I’m still not clear on Chaos.
MALCOLM: It simply deals with unpredictability in complex systems. The shorthand is the Butterfly Effect. A butterfly can flap its wings in Peking and in Central Park you get rain instead of sunshine.”
No, Ian Malcolm, XKCD is right. That doesn’t really clear things up. And I’m pretty sure that topological mixing is actually more fundamental to the concept of Chaos:
Wired also has a piece on the anniversary of the film (concentrating on the special effects).