PsychologyAugust 30, 2026

extradyadic

ek-struh-DAY-dik

Definition

Existing or occurring outside of a specific dyad, or a pair, such as a primary romantic relationship.

Etymology

Derived from the Latin prefix 'extra-' meaning 'outside' and the Greek root 'dyad' meaning 'pair' or 'couple.' It is a technical term used in sociology and psychology to describe actions or feelings involving someone outside a couple's boundary.

In the news

The article uses the term to describe 'extradyadic infatuation,' which refers to romantic feelings or preoccupation with someone other than one's primary partner. It distinguishes these internal feelings from the more traditional definition of physical infidelity.

Emotional infidelity is linked to a surprising mix of dark and light personality traits

Read the full article ↗

PsyPost

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