Acronym Finder
Triggers: !acr, !af
Try it
Kagi would openhttps://www.acronymfinder.com/serendipity.html
Run @acr in Kagi for Kagi's own results from www.acronymfinder.com only
URL pattern: https://www.acronymfinder.com/query.html
Searches www.acronymfinder.com, filed under Reference (words).