Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
rĕdĭtĭo, ōnis, f. [redeo], a going or coming back; a returning, return (very rare; more freq. reditus): quid illi reditio etiam huc fuit? * Plaut. Most. 2, 1, 30; so, huc, * Ter. Eun. 4, 4, 4: spe domum reditionis sublatā, * Caes. B. G. 1, 5: reditionis spem habere, Varr. ap. Non. 222, 17: celeritas reditionis, Cic. Verr. 2, 1, 6, § 16.