# symmetrical

### or sym·met·ric

[si-me-tri-kuhl or si-me-trik]

### adjective

characterized by or exhibiting symmetry; well-proportioned, as a body or whole; regular in form or arrangement of corresponding parts.

Geometry.

- noting two points in a plane such that the line segment joining the points is bisected by an axis: Points (1, 1) and (1, −1) are symmetrical with respect to the x-axis.
- noting a set consisting of pairs of points having this relation with respect to the same axis.
- noting two points in a plane such that the line segment joining the points is bisected by a point or center: The points (1, 1) and (−1, −1) are symmetrical with respect to (0, 0).
- noting a set consisting of pairs of points having this relation with respect to the same center.

Often symmetric. Mathematics.

- noting a square matrix that is equal to its transpose.
- noting a dyad or dyadic that is equal to its conjugate.
- noting a relation in which one element in relation to a second implies the second in relation to the first.

Botany.

- divisible into two similar parts by more than one plane passing through the center; actinomorphic.
- (of a flower) having the same number of parts in each whorl.

Chemistry.

- having a structure that exhibits a regular repeated pattern of the component parts.
- noting a benzene derivative in which three substitutions have occurred at alternate carbon atoms.

affecting corresponding parts simultaneously, as certain diseases.

## Origin of symmetrical

## Synonyms for symmetrical

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

## Related Words for symmetric

balanced, commensurable, commensurate, equal, proportional, proportionate, regular, shapely, well-formed## Examples from the Web for symmetric

### Historical Examples of symmetric

The normal profile is thus a symmetric cone with a flaring base.

The Elements of GeologyWilliam Harmon Norton

Fig. 217 shows a triskelion of symmetric spirals turned to the right.

The SwastikaThomas Wilson

Our hands, feet, and ears afford other illustrations of symmetric solids.

The Teaching of GeometryDavid Eugene Smith

Secondary manifestations are usually bilateral, and often symmetric in configuration and distribution.

Now it is the same thing with symmetric spherical triangles; we cannot superpose them.

The Teaching of GeometryDavid Eugene Smith

## symmetric

### adjective

## symmetrical

### adjective

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## symmetrical

Online Etymology Dictionary, © 2010 Douglas Harper

## symmetric

[sĭ-mĕt′rĭk]symmetrical (sĭ-mĕt′rĭ-kəl)

The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.