• (n.) Divination by the ashes of the altar on which a victim had been consumed in sacrifice.
Teph'ra·man`cy noun [ Greek ... ashes + - mancy .] Divination by the ashes of the altar on which a victim had been consumed in sacrifice. 
Tephramancy is a form of divination by means of ashes.
tephromancy, tephramancy Divination by examining the ashes from an altar that have been blown or thrown up into the air after consumation of the victims of a sacrifice. Related to spodomancy.