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The following lists ways of hunting or finding templates of Wikipedia markup-language (or markup macros)[1] by searching for related words. Also note that the word "template" has another connotation, mainly used by Wikipedia system admins, as a verb to refer to issuing a canned message to users, based on putting templates on user talk-pages.
In general, any template of the form {{xyzz}} is stored under page name "Template:Xyzz".
English Wikipedia has an extensive word-search index of all templates, to allow a wiki-search, similar to googling (as with Google Search, Yahoo! Search, Bing.com, Dogpile.com, etc.). For example, to search for the word "string" within any templates (or template names):
↑For many decades, the term "macro" has been used to denote a group of formatting directives, used to control computerized typesetting. However, Wikipedia has used the word "template" instead of "macro" for that purpose.
[ This essay is just a quick draft, to be expanded later. ]