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1 definition for trapdoor From The Collaborative International Dictionary of English v.0.48 :
Trapdoor \Trap"door`\, n.
1. (Arch.) A lifting or sliding door covering an opening in a
roof or floor.
[1913 Webster]
2. (Mining) A door in a level for regulating the ventilating
current; -- called also weather door. --Raymond.
[1913 Webster]
Trapdoor spider (Zool.), 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).
[1913 Webster]
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