Valid in these dictionaries
Meaning of ‘trapdoor’
2 definitions found.
(Arch.) A lifting or sliding door covering an opening in a roof or floor.
(Mining) 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).
Source: WordNet 3.0 Copyright 2006 by Princeton University
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