3. (n.) One of the sloping sides of the lower part of a blast furnace; also, one of the hollow iron or brick sides of the bed of a puddling or boiling furnace.
4. (n.) The lower part of a blast furnace, which slopes inward, or the widest space at the top of this part.
5. (n.) In forging and smelting, a trough in which tools and ingots are cooled.
