idea (or concept which can be expressed in one word) n.: holophrasis or holophrase (adj.: holophrastic)

The [venture capital] community seems to love its holophrases: “incubate,” “accelerate,” “longtail,” “freemium,” and of course, the mythical “unicorn.” These are all words that serve as shorthand for more involved concepts central to the investment universe. (Ajay Raju, “The Next Silicon Valley Will Be … Philly?” Philadelphia Citizen, October 23, 2018)