unmixed

From un- +‎ mixed.

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unmixed (comparative more unmixed, superlative most unmixed)

1. Pure, not mixed or combined.
   • 1940 July, R. A. H. Weight, “Hastings—An Interesting Traffic Centre”, in Railway Magazine, page 388:

     When necessary two six-car sets are coupled together throughout from Ore, but at Hastings this arrangement is not an unmixed blessing as the rear lead from one platform line to the other is fouled when a 12-coach train is standing at the platform.

2. (commutative algebra, of an ideal ${\displaystyle I}$ in a noetherian ring ${\displaystyle R}$) Such that its height is equal to the height of every associated prime of the quotient ${\displaystyle R/I}$ as a module over ${\displaystyle R}$.