I have wrestled a little bit with how to handle technical terms like abugida and virama. The first time I use them, it’s a no-brainer: I explain them. But what should I do the second time? I didn’t want to bore people by explaining the same thing over and over again, but I also didn’t want to confuse people who joined in the middle. (Don’t do that, start at the beginning.)
I decided that Wikipedia had great definitions of these terms, so I should just let people go there if they were confused.
However, fully 8% of my regular readership — Jeff Powell — asked for a glossary, and that overwhelming groundswell of support convinced me to write a glossary. If you need to find it again, it is the second link in the sidebar, right under Start at the beginning.