Noun
A fictional material or component which, if it existed, would enable one to easily solve a hard problem.
Synonym: handwavium
An especially rare material or component that is outrageously expensive or otherwise almost impossible to get hold of.
A high technology component that is extremely expensive.
Source: en.wiktionary.orgAnother largely synonymous term is wishalloy, citation Chapter 8 although the sense is often subtly different in that a wishalloy usually does not exist at all, whereas unobtainium may merely be unavailable. Source: Internet
Frequent Sunday night/Monday morning host of Coast to Coast AM George Knapp usually opens his show mentioning unobtainium. Source: Internet
For instance, unobtainium is described as being stronger than helium, and lighter than air. Source: Internet
In the 1970s, bicycle magazines, such as Bike World, sometimes referred to exotic lightweight bicycle parts as being made of unobtainium, which, while expensive, were commercially obtainable. Source: Internet
The concept of unobtainium is often applied flippantly or humorously. Source: Internet
The properties of any particular unobtainium depend on the intended use. Source: Internet