# equilateral

[ee-kwuh-lat-er-uh l, ek-wuh-]

### adjective

having all the sides equal: an equilateral triangle.

### noun

a figure having all its sides equal.

a side equivalent, or equal, to others.

## Origin of equilateral

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

## Related Words for equilateral

rectangular, quadrate, quadratic, foursquare, boxlike, boxy, orthogonal, rectilinear, squarish## Examples from the Web for equilateral

### Contemporary Examples of equilateral

### Historical Examples of equilateral

These are the equilateral triangle, the square and the regular hexagon.

Langstroth on the Hive and the Honey-BeeL. L. Langstroth

Are you aware, Mr Gascoigne, of the properties of an equilateral triangle?

Mr. Midshipman EasyCaptain Frederick Marryat

These are the equilateral triangle, the square, and the regular hexagon.

Animal IntelligenceGeorge J. Romanes

Form of the outer shell not a sphere, but a regular octahedron, with eight congruent, equilateral triangular even faces.

Marginal spines ten to twelve, equilateral triangular, deeply sulcated, about half as long and broad as the radius of the disk.

## equilateral

### adjective

### noun

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

Online Etymology Dictionary, © 2010 Douglas Harper

## equilateral

[ē′kwə-lăt′ər-əl]

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