
1) Aid in target shooting 2) Aiming aid in some gun sights 3) Measles symptom
Found on
https://www.crosswordclues.com/clue/reddot

RedDot, founded in 1993, is a business unit of Open Text Corporation and is referred to as the Web Solutions Group of Open Text. The software assists in the management of content, with regulatory compliance and industry specific requirements. Its core product, RedDot CMS is a Windows-based server application to allow Web content management in a mu...
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http://en.wikipedia.org/wiki/RedDot
No exact match found.