trapdoor
n. அடிநிலப் புழைக்கதவு, மோட்டுப் புழைக்கதவு, பொறிக்கதவு.
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).