A trapdoor is a door set into a floor or ceiling (depending on what side of the door one is on). A trapdoor could also be called a hatch. Hidden trapdoors occasionally appear in fiction, either as entrances to secret passageways, or as literal traps into which a hapless pedestrian may fall if he or she happens to stand on one. Hatch may refer to: Common nickname for gentlemen named Prachet Hatch, Utah Hatch, New Mexico Orrin Hatch Richard Hatch A hatch (door) is a door in a floor or ceiling. ... A secret passage is a hidden route that is used to travel stealthily. ...
Other uses
In computing, a trapdoor is a hidden value or set of values that allows access to a program, computer system, or data. It is sometimes erroneously confused with a backdoor.
A trapdoor function is a mathematical function that is easy to compute in one direction, yet (believed to be) difficult to compute in the opposite direction (finding its inverse) without special information, called the "trapdoor". Trapdoor functions are widely used in cryptography.
Trapdoor spiders are a family of spiders that construct burrows with trapdoor-like entrances.
The Trap Door Spiders are a male-only literary society in New York City, with a membership historically composed of notable science fiction personalities.
A backdoor in a computer system (or a cryptosystem, or even in an algorithm) is a method of bypassing normal authentication or obtaining remote access to a computer, while intended to remain hidden to casual inspection. ... A trapdoor function is a function that is easy to compute in one direction, and difficult to compute in the opposite direction (finding its inverse) without special information, called the trapdoor. ... Genera Bothriocyrtum Cyclocosmia Ummidia Trapdoor spiders (family Ctenizidae) are medium-sized mygalomorph spiders that construct burrows with a cork-like trapdoor made of soil, vegetation and silk. ... The Trap Door Spiders is the name of a literary male-only eating, drinking, and arguing society in New York City, with a membership historically composed of notable science fiction personalities. ... The Trap Door is a childrens claymation-style animated series, shown in the United Kingdom in 1984. ...
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Trapdoor spiders are close relatives of tarantulas, and their general appearance is similar, but they can be distinguished by their small size, less hairy abdomens, and legs that shine almost as if polished.
Trapdoor spiders are well-adapted for the strenuous activity of tunnel-building.
The tunnel is used by the trapdoor spider as shelter from the elements and predators, as a nursery, and as a trapping device.
Most trapdoor spiders but not all are misleadingly named, as not all species make a door for their burrows.
Brown Trapdoor Spiders are dull brown spiders with a cover of paler gold hairs on carapace ("dusty appearance"), which is usually weakly arched in side profile.
Trapdoors have a long life span, between 5 to 20 years, and take several years to reach maturity.
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