# axis of symmetry

- Mathematics. a straight line for which every point on a given curve has corresponding to it another point such that the line connecting the two points is bisected by the given line.
- Crystallography. rotation axis.

## Origin of axis of symmetry^{}

First recorded in 1875–80

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018