The term ‘seed’ traverses the depth-psychology corpus along several intersecting axes, each revealing a distinct stratum of symbolic meaning. At the most archaic level, as Onians exhaustively documents, seed is identified with the cerebro-spinal substance — the procreative life-soul material believed to originate in the marrow and brain, carrying with it the very essence of psyche and generation. This biological-metaphysical equation, shared by Hippocratic, Pythagorean, Stoic, and Hebrew traditions alike, grounds the term in a pre-modern physiological imagination in which psyche, spirit, seed, and strength are mutually implicating realities. Von Franz, working from Gnostic and alchemical sources, elevates seed to a cosmogonic register: in Basilides and in the Aurora Consurgens, the seed of the cosmos contains all potentialities compressed within the smallest space, an image of the unus mundus in embryo. Rudhyar transposes this cosmogonic register into a cyclical philosophy of culture, reading civilization itself as the seed-form of individuation — concentrated, integral, capable of surviving the decay of the seasonal plant. Hillman interrogates the demonic dimensions of seed in the acorn theory, where a ‘bad seed’ represents the daimon’s monothematic literalism turned destructive. Hillman also surfaces the classical philosophical controversy over female seed, locating in that dispute the ontological diminishment of the feminine. Together these voices constitute a rich, contested symbolic field in which seed names the compressed totality of potential — psychic, cosmic, biological, and civilizational.