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Yes, uniaxial is playable

...and is worth 18 points.

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"Uniaxial" Definition

adjective

Botany Of, relating to, or being a plant with one primary stem that has no branches and terminates in a flower.
Having one direction along which double refraction of light does not take place. Used of a crystal.
Of, relating to, or affecting one axis.
Having only one axis.
Of or relating to only one axis.