Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
cōlīphĭum (in MSS. also coll-), ii, n., a kind of nourishing food for athletœ, Plaut. Pers. 1, 3, 12; Mart. 7, 67; Juv. 2, 53; cf. colepium.