- something that divides or separates, as the line between light and dark areas on a partially illuminated surface.
- Mathematics. one of several symbols for separating components of a number, as a decimal point or comma.
Origin of separatrix
- another name for solidus (def. 1)
Word Origin and History for separatrix
line or hooked line used to separate printed figures, originally with numerals and used where modern texts use a decimal point, also in other specialized senses, from Late Latin (linea) separatrix, feminine agent noun from separare (see separate (v.)).