from οἶκος; properly, residence (abstractly), but usually (concretely) an abode (literally or figuratively); by implication, a family (especially domestics):--home, house(-hold).
neuter of a derivative of ἱλάσκομαι; an expiatory (place or thing), i.e. (concretely) an atoning victim, or (specially) the lid of the Ark (in the Temple):--mercyseat, propitiation.