I knew &quot;Peristeronic&quot; was a real word, because I&#x27;d seen it somewhere before. Turns out it was another xkcd: <a href="https:&#x2F;&#x2F;xkcd.com&#x2F;798&#x2F;" rel="nofollow">https:&#x2F;&#x2F;xkcd.com&#x2F;798&#x2F;</a>