Polycule

The web of romantic connections between a group of people — the network you would draw if you sketched everyone's relationships as nodes and edges.

1 min read · Reviewed 2026-05-20

Polycule is the polyamory community's term for the network of romantic connections that exists across a group of people. The image is borrowed from molecular diagrams: each person is a node, each romantic connection is a bond, and the whole shape is the polycule. A polycule can be as small as a V (one person partnered with two who are not partnered with each other) or as large as a sprawling network with dozens of people connected through several degrees.

The polycule is the unit of analysis that matters for most of the practical questions of polyamory. STI safety decisions ripple through it. Scheduling conflicts happen across it. When one relationship inside it shifts, others are affected. New partners are not just joining a couple or a triad; they are joining a polycule.

Polycules differ in shape, density, and integration. A dense polycule has many cross-connections (metamours dating each other, multiple shared partners); a sparse one has long chains with few cross-links. A V is the simplest non-trivial shape; common larger shapes include the N (a four-person chain), the triangle (three people each partnered with each other), the quad (four people with various internal pairings), and the Z (a longer chain with side branches).

Drawing the polycule out is sometimes useful — when explaining the situation to a new partner, when planning a holiday around shared time, when assessing how a change would ripple. Several apps now exist for this; many practitioners just sketch on paper.

Where this term fits in the wider picture

Ethical non-monogamy is a network of overlapping practices, identities, and structures — and Polycule connects to several of them. The neighbouring terms below show how this one sits alongside the rest of the vocabulary practitioners actually use; the guide at the end is the longer-form treatment of the same territory.

Closely-related vocabulary

Metamour
Your partner's other partner. Your partner-in-law, in a sense — a person you are connected to through a shared partner but are not themselves partnered with.
Polyamory
The practice of, or willingness to engage in, multiple loving romantic relationships, with the knowledge and consent of everyone involved.
V (vee)
A polycule shape in which one person is partnered with two others who are not partnered with each other.
Triad
Three people, each partnered with the other two — a complete triangle of romantic connection.
Quad
A four-person polycule with various internal connections — sometimes all four interconnected, sometimes a specific subset of edges.
Hinge
The shared partner connecting two metamours in a V — the person at the apex who is partnered with both of the others.

Questions practitioners actually ask about this

Continue reading

The longer treatment of this territory is in the guide What is ethical non-monogamy? A clear primer for adults thinking it through — An honest, plain-language introduction to ethical non-monogamy — what it is, what it isn't, the configurations it covers, and the questions it asks of you.

New to ethical non-monogamy? Start with the glossary for vocabulary, the structures index for the named relationship configurations practitioners actually use, and the guides for longer-form treatment of the common questions.