A reinforced concrete arched or domed roof used over unpartitioned areas.

A building without internal partitions or furnishings.

A room with computer equipment, exclusive of the equipment itself.The outer layer of a program that provides the user with a way of working with it, under the control of the computer's operating system.

1. The case of a pulley block.

2. A thin hollow cylinder.

3. A hollow hemispherical structure.

4. The outer wall of a vessel or tank.

1. The crust of the earth.

2. A thin hard layer of rock.

An engraved roller made of copper and used in calico printing.

1. The outer wall of a metal mold.

2. The hard layer of sand and thermosetting plastic formed over a pattern and used as a mold wall in shell molding.

3. The metal sleeve remaining when a billet is extruded with a dummy block at smaller diameter.

4. A tubular casting used in preparing seamless drawn tubes.

5. A pierced forging.

1. A hollow metal projectile designed to be projected from a gun, containing or intended to contain a high-explosive, chemical, atomic, or other charge.

2. A shotgun cartridge or a cartridge for artillery of small arms.

1. A hard, usually calcareous, outer covering on an animal body, as of bivalves and turtles.

2. The hard covering of an egg.

3. Chitinous exoskeleton of certain arthropods.