Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† pyrrhĭchĭus, a, um, adj., = πυρρίχιος; in prosody, pes, or simply pyrrhichius, a poetical foot consisting of two short syllables, a pyrrhic, Quint. 9, 4, 80; 106; 101; 140 al.; Mart. Cap. 9, § 975.