Is it ensure, insure, or assure?
a microscopic robot used in nanotechnology, a nano-robot; an extremely small autonomous self-propelled machine that may reproduce
robotics /nan"oh-bot/ A robot of microscopic proportions, presumably built by means of nanotechnology. As yet, only used informally (and speculatively!). Also called a "nanoagent". [Jargon File] (1999-07-19)