urim and thum·mim \|(y)u̇rə̇mənˈthəmə̇m, |u̇ˌrēmənˈtu̇ˌmēm\noun plural Usage: usually capitalized U&T Etymology: part translation of Hebrew ūrīm wĕthummīm : sacred lots possibly in the form of precious stones mentioned in the Old Testament as objects cast by a priest for the purpose of obtaining an oracle interpreted as the will of God