Pronunciation: /ˈɒkt.ənt/ Explain

An octant is one of the eight regions into which a three dimensional rectangular coordinate system is divided by the x, y, and z planes. The octant where x, y and z are positive is called the first octant. The other seven octants are not named.

What can you say about the values of x, y and z in octant one?
Manipulative 1 - Octant One in 3-D Coordinate System Created with GeoGebra.


  1. McAdams, David E.. All Math Words Dictionary, octant. 2nd Classroom edition 20150108-4799968. pg 129. Life is a Story Problem LLC. January 8, 2015. Buy the book

Cite this article as:

McAdams, David E. Octant. 4/27/2019. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/o/octant.html.

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Revision History

4/27/2019: Changed equations and expressions to new format. (McAdams, David E.)
3/25/2019: Changed 'quadrant' to 'octant'. (McAdams, David E.)
12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
9/5/2018: Removed broken links, updated license, implemented new markup. (McAdams, David E.)
8/5/2010: Initial version. (McAdams, David E.)

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