Jargon is a technical word used in a specific subject matter. So, Jargons are very difficult to understand to those who are not part of the specific community of experts that use it. So, supply airlock, hot zone and staging area are jargons used by the experts in those fields.
The fact that it has the word "extraneous" in it should be enough to prove my point. In no situation should an essay be difficult to read or understand, given that the point of an essay is to educate.
