Make Your Editor Cry: Axis (Awkward Plural)

Make Your Editor Cry:  Axis (Awkward Plural)

BLUF: (Bottom Line Up Front)
The plural of axis is axes.

axis: one of the reference lines of a coordinate system

The singular of axis is axis. The plural of axis is axes. Note the -e that replaces the -i.

The noun axis has a Greek root, which is the derivation of the plural axes. There is no alternative English plural form. Words like axises or making it a possessive axis’ or axis’s doesn’t work regardless of what style guide you may wish to consult. It’s axes.


The point where the axes meet is called
the origin.
The axes of a two-dimensional Cartesian system
divide the plane into four infinite regions, called quadrants.

One final note. The plural of ax is also axes. No relation.

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