Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
strāmen, ĭnis, n. [sterno, I.], straw, litter spread under any thing (poet. and in post-Aug. prose); sing.: tectam stramine vidit Forte casam, Ov. M. 5, 447; id. H. 5, 15; Verg. A. 11, 67; Sil. 10, 562; Plin. 10, 54, 75, § 152 al.
Plur., Ov. M. 3, 701; id. F. 3, 184; Stat. Th. 6, 56: straminum mollities, of a bed, Cael. Aur. Acut. 3, 8.