Bible Greek and Hebrew Dictionaries combined for Word Studies
Genesis Chapter 1
propitiation 2434 # hilasmos {hil-as-mos'}; atonement, i.e. (concretely) an expiator: -- {propitiation}.
propitiation 2435 # hilasterion {hil-as-tay'-ree-on}; neuter of a derivative of 2433; an expiatory (place or thing), i.e. (concretely) an atoning victim, or (specially) the lid of the Ark (in the Temple): -- mercyseat, {propitiation}.