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parallel axiom

noun, Geometry.

parallel postulate

noun, Geometry.
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.
Also called parallel axiom. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for parallel-axiom
Historical Examples
  • The parallel-axiom needs proof, since it does not hold for geometry on the surface of the sphere.

    The Mystery of Space Robert T. Browne
parallel-axiom in Science
parallel postulate  
See under Euclidean.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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