Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. Lĭbănus (scanned Lībănus, Sedul. 4, 55), i, m., = Λίβανος (Hebr. Lĕbānōn),
2. Lĭbănus, i, m., the name of a slave, Plaut. As. 1, 1, 37.