phron·tis·tery \ˈfräntəˌsterē\noun (-es) Etymology: Greek phrontistērion, from phrontistēs philosopher, deep thinker, person with intellectual pretensions, from phrontizein to reflect, take thought, from phrontid-, phrontis reflection, thought; akin to Greek phren-, phrēn diaphragm, mind : a place for thinking or study