Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. ornĕus, a, um, adj. [ornus], of the wild mountain-ash: frons, Col. 11, 2, 82.
2. Ornēus, i, m., = Ὄρνειος, a Centaur at the wedding of Pirithoüs, Ov. M. 12, 302.