Word of the Day: Diegetic

I like words, the more obscure the better.
In fact, I have been accused of being a "word snoot."
Lately I've been running across a word I've never heard before: DIEGETIC. The first time I saw it in a piece of script coverage written by one of my subcontractors. Then I saw it in an actual script. The first place I looked it up was Wikipedia, where the definition was so obscure I felt like someone was trying (and not for the first time) to explain the meaning of "semiotics" to me. Then I found this, which explains that "diegetic sound" is sound made by something you can see or something you can assume is nearby. That's not a word I would ever have been able to puzzle out.