Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Lĭbŭi, ōrum, m., a people of Gallia Transpadana, Liv. 5, 35; 21, 38; 33, 37; perh. identical with Libici, Plin. 3, 17, 21, § 124.