Separatrix Sep`a*ra"trix, n.; pl. L. {-trices}, E. {-trixes}. [L., she that separates.] (Arith.) The decimal point; the dot placed at the left of a decimal fraction, to separate it from the whole number which it follows. The term is sometimes also applied to other marks of separation. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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