The word "lexicon" is Greek and translates to "of or for words." The Splunk lexicon (or the "Sp-lexicon") explains all the technical terms that are used with the Splunk technology. All descriptions reference the Splunk product documentation (via links).

You can use Splexicon as an "intelligent user interface" to online Splunk reference manuals, tutorials, and related information, allowing you to easily look up Splunk terminology and then "jump right to" the documentation and informational details pertaining to that term.

Have a look at the following screenshot as an example of the documentation and informational details pertaining to the term Alert Manager: