Separatrix

Separatrix (from Latin, the feminine form of "separator") may refer to:


 * Separatrix (decimal mark), an mark or vertical bar  formerly used as a decimal point
 * Separatrix, a proofreader's mark resembling the slash
 * Separatrix in math, the boundary separating two modes of behaviour in a differential equation
 * A mechanism for magnetically limiting a plasma, and hence for controlling the nuclear fusion in a tokamak; see divertor