Hypertext

Hypertext is a style of computer user interface in which documents are connected with other documents via hyperlinks. A hyperlink is a part of a given document that when selected triggers the display of another document, or another part of the original document.

This labyrinthine lexicon you are currently exploring is a hypertext document. You reached this page via a hyperlink (usually just called a "link"), and this page contains other links that will trigger the display of other pages of the document.