terminology - What is the technique called when series of events in a film are played in reverse order?

Reverse chronology is a method of story-telling whereby the plot is
revealed in reverse order.

In a story employing this technique, the first scene shown is actually
the conclusion to the plot. Once that scene ends, the penultimate
scene is shown, and so on, so that the final scene the viewer sees is
the first chronologically.

Many stories employ flashback, showing prior events, but whereas the
scene order of most conventional films is A-B-C-etc, a film in reverse
chronology goes Z-Y-X-etc.