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

Examples from the Web for parallel axiom

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

    The Mystery of Space|Robert T. Browne
  • The last published work of Saccheri was a recital of his endeavors at demonstrating the parallel-postulate.

    The Mystery of Space|Robert T. Browne

Science definitions for parallel axiom

parallel postulate

See under Euclidean.

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