Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† procŏmĭon, ĭi, n., = προκόμιον, the hair on the front part of the head, the front hair (pure Lat. antiae), Veg. Vet. 3, 11, 4 Schneid. N. cr. (al. protocomia).