Ledge; pedestal block.

And these are the measures of the altar after the cubits: The cubit is a cubit and an hand breadth; even the bottom shall be a cubit, and the breadth a cubit, and the border thereof by the edge thereof round about shall be a span: and this shall be the higher place of the altar. And from the bottom upon the ground even to the lower SETTLE shall be two cubits, and the breadth one cubit; and from the lesser SETTLE even to the greater SETTLE shall be four cubits, and the breadth one cubit. ( Ezekiel 43:13-14 )