It is jargon, i think pretty much any field has those - though graphics and gamedev have a lot of their own (sometimes conflicting).
My favorite is "brush" to mean convex polyhedron. I remember when i joined a gamedev company years ago and was looking around the editor and noticed some buttons with a paintbrush - clicking it didn't do anything and after asking around it turned out this was for making in-editor 3d geometry but the artist who made the icon (we wanted to release the editor which meant someone went and remade all the programmer-made icons) didn't knew about it or about the terminology (i think the original programmer-made icon had the word "brush"), so he just drew what the button was supposedly about: a brush :-P.
I just went through this a couple of weeks ago. I joined a game dev company recently and I’ve been experiencing a lot of it. Another is calling everything a particle for physics simulations. Please let me know if you can think of any other.
My favorite is "brush" to mean convex polyhedron. I remember when i joined a gamedev company years ago and was looking around the editor and noticed some buttons with a paintbrush - clicking it didn't do anything and after asking around it turned out this was for making in-editor 3d geometry but the artist who made the icon (we wanted to release the editor which meant someone went and remade all the programmer-made icons) didn't knew about it or about the terminology (i think the original programmer-made icon had the word "brush"), so he just drew what the button was supposedly about: a brush :-P.