Within the final review of CSS, question regarding what the letters CSS stand for

No, not even remotely. That's just a title that was used for one of the Treehouse videos.

CSS stands for Cascading Style Sheets (the last s is important, many tend to forget to write it). CSS are styles sheets used to describe the style of a webpage, and they are cascading in the sense that if you have multiple CSS rules that target the same element and property of the same specificity then the last rule overrides the earlier rules.

Thank you..I found that out immediately after I posted this!