A private phrase I tend to use to mean something like, "this set of concepts has power because it captures some truth in an elegantly formal way". Usually meant admiringly; in that I wish my own thoughts had this powerfully precise bite to them. Freud, Norman O. Brown, RD Laing, are some authors who exhibit this quality of thought (for good or ill).
May be related to structuralism, although I never really understood what that was all about to be honest, whereas algebraic is something deeply felt. GOFAI tends towards the algebraic: Cyc, but even more Meaningness's early work cognitive cliches
Also suggests various occult systems like Tarot and Kabbalah, or something meta to them.