The Collaborative International Dictionary
Cteniza Californica
Trapdoor \Trap"door`\, n.
(Arch.) A lifting or sliding door covering an opening in a roof or floor.
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(Mining) A door in a level for regulating the ventilating current; -- called also weather door.
--Raymond.Trapdoor spider (Zo["o]l.), 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 ( Cteniza Californica).