Glossaries are great way to help explain or give meaning to a term. In the past I have made students create their own glossary to explain scientific or mathematical terms. This has worked for some students - and hasn't for others.
I came across this image on Pintrest recently.
My criteria for their Visual Vocabulary consisted of three parts - the term, a definition and a picture of or illustrating that term. Summarising the term or creating a diagrammatic situation challenge their thinking and hopefully in turn made the word easier to remember.