I think a little back story is needed to explain this. So this past week I was part of HAS 2017 Week 1 at Johnson Space Center in Houston Texas. I was part of Team Delta. We named ourselves many things but decided to go with Delta Team 11 in the end (only name everybody agreed with). We made a patch, which can be seen here: Delta Team 11 (Patch) #HAS2017 (this was our team insignia).
My team was responsible for the "Working There" section. In this we had to research, design, and present tools, a layout for labs, and (most importantly) the space suits to be used on Mars. EVA stands for "Extra Vehicular Activity" and is what we call the current space suits used on space walks and lunar explorations. One of our team members had the idea of placing our insignia on the models we...
Made (just a Helmet and a Glove). So I was thinking about it (i was in charge of the helmet, i was the only one willing to do it) and I thought "Everything at NASA has a name that fits as a word for an acronym...." So then I thought "Why don't we do the same with our EVA suits." So then we decided to go with a simple thing. "Delta Extravehicular Activity suit" also known as "DEVA suit"
Now I don't know if Deva is a legitament word but we meant it to be pronounced like "diva." Just a fun little thing so that whenever we had to write about it we could just write DEVA instead of "Delta Extra Vehicular Activity." After we decided on that we just put a variation of our insignia containing the acronym on the helmet and glove :P