- Symmetry is an attribute where something is the same on both sides of an axis.
An example of symmetry is a circle that is the same on both sides if you fold it along its diameter.

## symmetry

noun

*pl.*symmetries

- similarity of form or arrangement on either side of a dividing line or plane; correspondence of opposite parts in size, shape, and position; condition of being symmetrical: the whole or the corresponding parts are said to have symmetry
- balance or beauty of form or proportion resulting from such correspondence

Origin of symmetry

; from Middle French or L: Middle French*symmetrie*(now

*symétrie*) ; from Classical Latin

*symmetria*; from Classical Greek ; from

*symmetros,*measured together ; from

*syn-,*together +

*metron,*a measure

## symmetry

noun

*pl.*

**sym·me·tries**

- The correspondence of the form and arrangement of elements or parts on opposite sides of a dividing line or plane or about a center or an axis:
*the symmetry of a butterfly's wings.* - A relationship in which there is correspondence or similarity between entities or parts:
*the symmetry of the play, which opens and ends with a speech by a female character.* - Beauty as a result of pleasing proportions or harmonious arrangement:
*“Here were the ringlets, framing a face of exquisite symmetry”**(Clive Barker).* -
*Physics*Invariance under transformation. For example, a system that is invariant under rotation has rotational symmetry.

Origin of symmetry

Latin*symmetria*, from Greek

*summetriā*, from

*summetros*,

*of like measure*:

*sun-*,

*syn-*+

*metron*,

*measure*; see

*mē-*

^{2}in Indo-European roots.

**symmetry**

top: bilateral symmetry

bottom: radial symmetry

## symmetry

See also form.

asymmetry the quality or condition of lacking symmetry. —**asymmetrical, asymmetric, adj.**

**bisymmetry**Botany. the condition of having two planes of symmetry at right angles to one another. —

**bisymmetric, bisymmetrical, adj.**

**monosymmetry**

**1.**the state exhibited by a crystal, having three unequal axes with one oblique intersection; the state of being monoclinic. See also biology.

**2.**Biology. the state of being zygomorphic, or bilaterally symmetric, or divisible into symmetrical halves by one plane only. See also

**zygomorphism.**See also

**PHYSICS.**—

**monosymmetric, monosymmetrical, adj.**

**symmetromania**a mania for symmetry.

**symmetrophobia**an abnormal fear or dislike of symmetry.

## symmetry

Noun

(*plural* symmetries)

- Exact correspondence on either side of a dividing line, plane, center or axis.
- (uncountable) The satisfying arrangement of a balanced distribution of the elements of a whole.

Origin

From Latin *symmetria*, from Ancient Greek *συμμετρία* (symmetria), from *σύμμετρος* (summetros, “symmetrical”), from *σύν* (sun, “with”) + *μέτρον* (metron, “measure”).