lack of uniformity; unevenness; inequality; disproportion
General term for something not being uniform, even, or equal; used as a noun or na-adjective.
There is a lack of uniformity in the quality of education in this region.
色が不均一に塗られてしまった。
The color was applied unevenly.
noun-modifying (irregular)
heterogeneous; nonuniform
Chemistry term for a mixture or substance that is not uniform in composition.
不均一な混合物を撹拌する。
Stir the heterogeneous mixture.
Also means 'unequal' or 'unbalanced', but often used for distribution or opportunity rather than physical uniformity.
Compound of 不 (fu-, 'not') + 均一 (kin'itsu, 'uniform').