Chimney

• architecture

A structure which provides ventilation.

• geology

1. An ore shoot or pipe. See also: chute
2. A term used for limestone pinnacles bounding zinc ore deposits.
3. A vertical or nearly vertical staple shaft between a lower and an upper coal seam.
4. An orebody that is roughly circular or elliptical in horizontal cross section, but may have great vertical extent. Nelson
5. A restricted section in a lode; rising steeply and unusually rich. See also: pipe
6. A cylindrical vent for volcanic rock. Standard, 2
   Source: Dictionary of Mining, Mineral, and Related Terms