Signifying Dissymmetry

Signifying Dissymmetry names Lacan's claim that the asymmetry between the sexes in the Oedipus complex is not grounded in anatomical difference but in a structural fault within the symbolic order itself: there is no signifier adequate to "woman" as such. Because the signifier is constitutively asymmetric — the phallus functions as the privileged signifier of desire and of the Other's lack, with no feminine counterpart — the two sexes are forced to traverse the Oedipus complex along structurally non-equivalent paths. For the boy, the phallic signifier anchors his trajectory directly (through the threat of castration); for the girl, the absence of a signifier for her sex compels a detour through identification with the phallic image, taking the male position as a provisional symbolic foothold. The dissymmetry is therefore not complementary but constitutive of an irreducible lack in the symbolic itself.

This concept extends Lacan's broader account of castration as a symbolic operation: what is "missing" for the girl is not an organ but a signifier — a position in the chain. The phallus, stripped of its anatomical reference, becomes the pivot of sexuation for both sexes precisely because it is the only term available, producing a structurally lopsided (dissymmetric) distribution. This is what grounds the hysteric's founding question — "What is a woman?" — as an unanswerable demand addressed to a symbolic order that has, from the outset, failed to provide the answer.

Signifying Dissymmetry appears in jacques-lacan-seminar-3 at page 189, squarely within Lacan's sustained engagement with psychosis and the symbolic order, but deployed here to reframe the Oedipus complex. It is best understood as a specification of the concept of Castration: whereas castration in the broader corpus names the structural loss of jouissance introduced by the signifier as such, signifying dissymmetry localizes and sharpens this by identifying a concrete asymmetry within the signifying system — the absence of a feminine signifier — as the engine that differentiates masculine and feminine oedipal trajectories. It thus extends the castration concept by explaining why castration does not operate symmetrically across the sexes.

The concept also intersects with Alienation: just as alienation describes how entry into the symbolic order forces a losing choice (being vs. meaning), signifying dissymmetry describes a further, sex-differentiated version of that losing choice — the girl's forced detour through the phallic signifier is a species of symbolic alienation with no symmetrical counterpart for her sex. Its clinical stakes are anchored in Hysteria and Feminine Sexuality: the hysteric's question "What is a woman?" is not a personal neurotic puzzle but the symptomatic return of the symbolic gap that signifying dissymmetry names. The concept stands in implicit contrast to the Ego Psychology approach (also cross-referenced), which would naturalize sexual difference as anatomical adaptation; Lacan's move here is precisely to insist the difference is in the signifier, not the body.

Seminar III · The PsychosesJacques Lacan · 1955 (p.189)

It's a matter of a dissymmetry in the signifier. This signifying dissymmetry determines the paths down which the Oedipus complex will pass.

The phrase "dissymmetry in the signifier" is theoretically loaded because it relocates sexual difference entirely within the symbolic order — not anatomy, not biology, not imaginary form — and the follow-on claim that this dissymmetry "determines the paths" of the Oedipus complex makes the symbolic lack causally primary, subordinating the entire clinical topology of neurosis and sexuation to a structural asymmetry in the signifying chain itself.