Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† pŏdismus, i, m., = ποδισμός, a measuring out by feet, foot-measure (post-class.): ad podismum dimetiri loca, Veg. Mil. 2, 7 fin.; 3, 15; Front. Colon. p. 130 Goes.; Inscr. Orell. 4570.