Molecule

Also: polycule diagram, relationship map

Affectionate slang for a large or complex polycule, drawn from the way relationship maps resemble the ball-and-stick molecular diagrams from chemistry class.

1 min read · Reviewed 2026-05-24

Molecule is playful community vocabulary for a polycule — especially a big, branching one — that comes from the visual resemblance between a relationship map and a chemistry molecular model. People (the atoms) connected by relationships (the bonds) genuinely do diagram out like a molecule, and the word 'polycule' itself is a portmanteau of 'poly' and 'molecule.'

Drawing the molecule is a real practice, not just a metaphor: people sketch out who is partnered with whom, who the metamours are, and who's connected to whom across a network, both to explain their situation to others and to make sense of it themselves. The diagrams get genuinely intricate in larger constellations, with vees, triads, and quads linking up into sprawling structures.

The term is warm and a little self-aware — it gently acknowledges that a complex polyamorous network can look complicated from the outside, while celebrating the web of connection rather than apologising for it.

Where this term fits in the wider picture

Ethical non-monogamy is a network of overlapping practices, identities, and structures — and Molecule 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

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.
Constellation
An alternative term for polycule — the web of romantic and intimate connections that includes someone's partners, those partners' partners, and so on.
Polyfamily
A polycule that functions as a chosen family — shared household, shared finances, often shared parenting — across more than two adults.
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.

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.