Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
postmŏdum, adv. [post-modus], afterwards, presently, shortly (mostly post-Aug.): saepe ex injuriā postmodum gratiam ortam, Liv. 1, 9, 15: ne postmodum flecti precibus aut donis regiis posset, id. 2, 1, 9; 2, 2, 10; 2, 9, 7 Weissenb. (al. postmodo); Suet. Calig. 15; Val. Max. 2, 9, 9; 2, 10, ext. 2; Col. 1, 5, 9; 5, 9, 17; 6, 2, 6; Cels. 7, 26, 3.