direction cosine
noun
: any of the cosines of the three angles between a directed line in space and the positive direction of the axes of a rectangular Cartesian coordinate system
—usually used in plural
Word History
First Known Use
circa 1889, in the meaning defined above
Time Traveler
The first known use of direction cosine was
circa 1889
Dictionary Entries Near direction cosine
Cite this Entry
“Direction cosine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/direction%20cosine. Accessed 28 Nov. 2023.
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