n. - A fireplace or hearth.
n. - That part of a building which contains the smoke flues; esp. an upright tube or flue of brick or stone, in most cases extending through or above the roof of the building. Often used instead of chimney shaft.
n. - A tube usually of glass, placed around a flame, as of a lamp, to create a draft, and promote combustion.
n. - A body of ore, usually of elongated form, extending downward in a vein.