If they meant texture size, 1500 isn't a power of 2. I guess some studios use textures that are off the power of 2 grid, like Bungie, but its kind of rare isn't it?
I too never heard of it before, this reminds me of a similar thread (several month`s ago) where someone else had a test as well at a big studio and he asked also a odd term. Turned out after googling, some person at that studio did not knew his vocabulary and used it all over the website. Maybe it was a internal term the…