'Separatrix' definitions:

Definition of 'separatrix'

(from WordNet)
noun
A punctuation mark (/) used to separate related items of information [syn: solidus, slash, virgule, diagonal, stroke, separatrix]

Definition of 'Separatrix'

From: GCIDE
  • 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]