&gt; <i>An embedded lookup structure is a data structure in which the internal pointers used to search for an object (such as branch nodes) are embedded within the objects you are searching through.</i><p>This used to be called &quot;intrusive container&quot; not long ago.<p>Hey look, it&#x27;s even a tag on StackOverflow:<p><a href="http:&#x2F;&#x2F;stackoverflow.com&#x2F;questions&#x2F;tagged&#x2F;intrusive-containers" rel="nofollow">http:&#x2F;&#x2F;stackoverflow.com&#x2F;questions&#x2F;tagged&#x2F;intrusive-containe...</a>