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).
Weirdly also used to mean roughly "awesome" by Finn in Adventure Time.
May be related to structuralism, although I never really understood what that was all about to be honest, whereas algebraic is something deeply felt.
Also suggests various occult systems like Tarot and Kabbalah, or something meta to them.