Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† marsūpĭum (-suppium), ii, n., = μαρσύπιον, a pouch, purse (ante- and postclass.): curam marsupii habere, Varr. ap. Non. 142, 1: nummi aurei in marsupio, Plaut. Rud. 5, 2, 26: quom inspicio marsupium, id. Men. 2, 1, 29: exenterare, to empty, id. Ep. 2, 2, 3; Prud. Psych. 600; Alcim. 6, 311.