transient electronics noun electronic circuits that dissolve or decompose when they are no longer needed or in use

The money for Rogers’ transient electronics work comes mainly from the Defense Advanced Research Projects Agency (DARPA), a Department of Defense unit that funds some of the wildest ideas in science.

[Smithsonian (US culture and science magazine) Dec. 2013]

the sharing economy noun an economy driven by peer-to-peer lending and other such initiatives, often enabled by the Internet

You’ve most likely seen news stories about the ‘sharing economy,’ with seemingly every blogger and op-ed columnist offering a take on its significance.

[www.forbes.com 07 October 2013]

trolleyology noun the examination of the philosophical problem that requires a choice that one person be sacrificed in order to save several people

After several decades maturing in university philosophy departments, trolleyology has burst into the public eye with two new books coming out at once.

[New York Times Book Review (US weekly book review) 24 November 2013]