direction angle

noun

: an angle made by a given line with an axis of reference
specifically : such an angle made by a straight line with the three axes of a rectangular Cartesian coordinate system
usually used in plural

Word History

First Known Use

1882, in the meaning defined above

Time Traveler
The first known use of direction angle was in 1882

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Cite this Entry

“Direction angle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/direction%20angle. Accessed 5 Jul. 2026.

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