Greek
2435. hilasterion -- propitiatory ... of propitiation, (b) the covering of the ark, which was 
sprinkled with the 
... mercy seat. 
... specially) the lid of the Ark (in the Temple) -- 
mercyseat, propitiation. 
... /greek/2435.htm - 7kNave's Topical Index
Leviticus 16:14,15And he shall take of the blood of the bullock, and sprinkle it with his finger on the mercy seat eastward; and before the mercy seat shall he sprinkle of the blood with his finger seven times.
Nave's Topical Index—AKJV