BiLinks
BiLinks, written as , is a shortcut for the 
WikiPragma, suggested as template and here named "Bilinks List Introducer".
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Template:BiLinks Template Suggestion with chain icon 'OO', or simply ,
Note:
BiLinks is a generalization of TwinPage, which is a bidirectionally linked page to another page with the same name, characterized by the symbol , whereas bidirectionally linked pages with (not necessarily but preferably) different names, are characterized by the symbol as "Bilinks List Introducer".