Category:Trapdoor

Trap"door`, n.

1. (arch.)

Defn: a lifting or sliding door covering an opening in a roof or Floor.

2. (mining)

Defn: a door in a level for regulating the ventilating current; -- Called also weather door. Raymond. Trapdoor spider (zoöl.), 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 a trapdoor. Most of the species belong to the genus cteniza, as the california Species (c. Californica).