Dict: strongs - Thummim

Strongs:

H2833 @ חשׁן chôshen kho'-shen From an unused root probably meaning to contain or sparkle; perhaps a pocket (as holding the Urim and {Thummim}) or rich (as containing {gems}) used only of the gorget of the highpriest: - breastplate.

H8550 @ תּמּים tûmmîym toom-meem' Plural of H8537; {perfections} that {is} (technically) one of the epithets of the objects in the high priest´ s breastplate as an emblem of complete Truth: - Thummim.