Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Ĕlaeūs, ūntis, f., = Ἐλαιοῦς, a city on the Hellespont in the Thracian Chersonesus, Liv. 31, 16, 5 Drak. N. cr.; Plin. 4, 11, 18, § 49.
Elēüs, Mel. 2, 2, 7.