irreductionn.

/ɪrɪˈdʌkʃən/ rare.
the world > space > extension in space > reduction in size or extent > [noun] > non-reduction
1888 LII. 442 This increase in volume was the only cause of irreduction [of the hernia].
This entry has not yet been fully updated (first published 1900; most recently modified version published online March 2018).