No, it isn't we never called it 'cosplay' - it was the early 1990s and no one was using that obnoxious term.
Oxford Dictionary:
cos·play
noun
the practice of dressing up as a character from a movie, book, or video game.
Unless you know more than the oxford dictionary people,
By-the-way your post has nothing to do with the opening question of this thread - names for an NPC scientist. A Human NPC (Not a Klingon)
Mocking my name or picture is not the question or conversation.
-Ed C.
Well, my initial post did but its true, it derailed a bit after that.