# 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.

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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 of parallel axiom

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.

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The American Heritage® Science Dictionary
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