Trapdoor

A trapdoor is a sliding or hinged door, flush with the surface of a floor, roof, or ceiling, or in the stage of a theatre. A hatch, an opening which may also be in a wall and need not be flush with the surface, is similar; in some cases either name is applicable. A small door in a wall, floor or ceiling used to gain access to equipment is called a...
Found on http://en.wikipedia.org/wiki/Trapdoor

Trapdoor

• (n.) A lifting or sliding door covering an opening in a roof or floor. • (n.) A door in a level for regulating the ventilating current; -- called also weather door.
Found on http://thinkexist.com/dictionary/meaning/trapdoor/

trapdoor

1. A lifting or sliding door covering an opening in a roof or floor. ... 2. <chemical> A door in a level for regulating the ventilating current; called also weather door. ... <zoology> Trapdoor spider, any one of several species of large spiders which make a nest consisting of a vertical hole in the earth, lined with a hinged lid, like ...
Found on http://www.encyclo.co.uk/local/20973

Trapdoor

As in Trapdoor buttplate or Trapdoor Pistol Grip Cap---one of these articles of furniture including a hinged plate, covering a small compartment below in which may be stored several extra cartridges, sight bits, extra springs or pins, cleaning rod, etc.
Found on http://www.hallowellco.com/abbrevia.htm

Trapdoor

In architecture a trapdoor is a lifting or sliding door covering an opening in a roof or floor.
Found on http://www.probertencyclopaedia.com/browse/TT.HTM

Trapdoor

In mining a trapdoor or weather door is a door in a level used for regulating the ventilating current.
Found on http://www.probertencyclopaedia.com/browse/AT.HTM
No exact match found