‖n.; pl. Psyllæ [ NL., from Gr. &unr_; a flea. ] (Zool.) Any leaping plant louse of the genus Psylla, or family Psyllidæ. [ 1913 Webster ]

n. [ Cf. Suillage, Sulliage. ] 1. Drainage of filth; filth collected from the street or highway; sewage. [ Obs. ] [ 1913 Webster ]

The streets were exceedingly large, well paved, having many vaults and conveyances under them for sullage. Evelyn. [ 1913 Webster ]

2. That which sullies or defiles. [ Obs. ] [ 1913 Webster ]

It is the privilege of the celestial luminaries to receive no tincture, sullage, or difilement from the most noisome sinks and dunghills here below. South. [ 1913 Webster ]

3. (Founding) The scoria on the surface of molten metal in the ladle. [ 1913 Webster ]

4. (Hydraul. Engin.) Silt; mud deposited by water. [ 1913 Webster ]

Sullage piece (Founding), the sprue of a casting. See Sprue, n., 1 (b). [ 1913 Webster ]