ἱλαστήριον
hilastērion
hil-as-tay'-ree-on
Neuter of a derivative of G2433; an expiatory (place or thing), that is, (concretely) an atoning victim, or (specifically) the lid of the Ark (in the Temple)
KJV Usage: mercyseat, propitiation.
KJV Usage: mercyseat, propitiation.