# parallel postulate

- the axiom in Euclidean geometry that only one line can be drawn through a given point so that the line is parallel to a given line that does not contain the point.

Show More

Also called parallel axiom.

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

## Examples from the Web for parallel axiom

### Historical Examples

#### The last published work of Saccheri was a recital of his endeavors at demonstrating the parallel-postulate.

The Mystery of SpaceRobert T. Browne

#### It consists of results arrived at by geometers in seeking a proof of the parallel-postulate.

The Mystery of SpaceRobert T. Browne

## parallel postulate

- See under Euclidean.

Show More

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