Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
lĭēnōsus, a, um, adj. [lien], splenetic: cor lienosum, Plaut. Cas. 2, 6, 62.
Plur. as subst.: tactu lienosis medebatur, Plin. 7, 2, 2, § 20.