MicroContent is a collection of meaningful information delivered in a chunk of about a paragraph's length: It is argued that if an IDEA takes more space than this to explain 'in a nutshell' ...then it is unlikely to be of much practical use to the clinician on the ground.

The TiddlyWiki format refers to one of these these chunks of MicroContent as a Tiddler.

In the digital world of the web, a collection of 'pages' that are interlinked and which cover a specific area is known as a 'Wiki'- for instance see the online encyclopaedia www.wikipedia.com . Hence the term 'TiddlyWiki'.