Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* mŏnŏcĕros, ōtis, m., = μονόκερως, a unicorn: asperrimam autem feram monocerotem, reliquo corpore equo similem, capite cervo, pedibus elephanto, cauda apro, mugitu gravi, uno cornu nigro mediā fronte cubitorum duūm eminente, Plin. 8, 21, 31, § 76; Sol. 52, 39.