Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ūnŏcŭlus, a, um, adj. [unus-oculus], one-eyed: Cyclops, Att. ap. Gell. 3, 11, 5: gens (Arimaspi), Sol. 15 med.
Subst.: ūnŏcŭlus, i, m., a one-eyed person, Plaut. Curc. 3, 22 sqq.