n. [ F.niais fresh from the nest, a derivative fr. L. nidus nest. E. an eyas for a nias. See Nest, and cf. Nias, Jashawk. ] (Zoöl.) A nesting or unfledged bird; in falconry, a young hawk from the nest, not able to prey for itself. Shak J. H. Walsh [ 1913 Webster ]

a. Unfledged, or newly fledged. [ Obs. ] [ 1913 Webster ]

Like eyas hawk up mounts unto the skies,
His newly budded pinions to assay. Spebser. [ 1913 Webster ]

n. [ Eyas + muske the brid. ] An unfledged or young male sparrow hawk. [ Obs. ] Shak. [ 1913 Webster ]