An ansible is a category of fictional devices or a technology capable of near-instantaneous or faster-than-light communication. It can send and receive messages to and from a corresponding device over any distance or obstacle whatsoever with no delay, even between star-systems. As a name for such a device, the word "ansible" first appeared in a 1966 novel by Ursula K. Le Guin. Since that time, the term has been broadly used in the works of numerous science-fiction authors, across a variety of settings and continuities.[1] A related term is ultrawave.[2][3]
Sheidlower
was invoked but never defined (see the help page).