Benefit of doubt; they're likely using it as shorthand for 'equivalent to turboprop style/class engine' as an established feature set to have a drop in alternative to.
lol, love this. Yeah, high bypass turbofan was what I was thinking about, and yes those are "jet" engines. Model airplanes use something called an electric ducted fan or EDF[1], and it has the nice properties in that you can run it over a wide range of speeds if desired. The recent Black Sea MQ-9 incident would, in my opinion, turned out differently if that drone used a shrouded engines for propulsion.