Sometime in the last quarter of the 20th century (or just possibly in the very early 2000s) I read somewhere the following definition of science fiction (not word-for-word, I paraphrase):
Science fiction is fiction designed to appeal to youths with an interest in science and technology.
I would like to know the source and the exact wording of that definition. I'm pretty sure that I read it in the editorial matter of some sci-fi anthology. Of course that definition may have been repeated or quoted elsewhere.