Definition of "uchronia"

Mercier's resort to uchronia, on the other hand, initiates a new paradigm for utopian literature not only by setting action in a specific future chronologically connected to our past and present but even more crucially by characterizing that future as one belonging to progress and thus linked causally if not immediately to the reader's time.

1987, Paul K. Alkon, Origins of Futuristic Fiction, page 127

For Portelli, uchronia comprises 'that amazing scene in which the author imagines what would have happened if a certain historical event had not taken place'.

2007, Andy Wood, The 1549 Rebellions and the Making of Early Modern England, page 211

This uchronia actually exerted some influence in its time, converting many readers to socialism because they wanted to live in the world of Bellamy's vision.

2011, Lealand B Yeager, Is the Market a Test of Truth and Beauty?, page 389