Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
dēclīnis, e, adj. [declino], turning aside (perh. only in the two foll. places): declinia juga, Stat. Th. 5, 297 (quae declinarent et fugerent, Schol.). So of the retreating motion of the sea in ebb and flood: undae, ebbing, Luc. 4, 427 dub. (al. declivibus).