symmetry
n. C / Un. the quality of having two halves that match each other perfectly. You see this when one side of a shape or object is a mirror image of the other.
n. the quality of being made up of exactly similar parts facing each other or around an axis. Often implies a sense of harmonious and beautiful proportion.
The butterfly's wings have perfect symmetry.
Architects often use symmetry in building design to create a feeling of balance and stability.
The mathematician explained how the underlying symmetry of the crystal structure determines its physical properties and how it interacts with light.
From Latin symmetria, from Ancient Greek συμμετρία (summetría), from σύμμετρος (súmmetros, “symmetrical”), from σύν (sún, “with”) + μέτρον (métron, “measure”). By surface analysis, sym- + -metry.
Uncountable when referring to the general quality; countable when referring to specific mathematical or physical properties.