Separatrix

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

• Separatrix (decimal mark), an {{angle brackets|L}} mark or vertical bar {{angle brackets|{{!}}}} formerly used as a decimal point
• Separatrix, a proofreader's mark resembling the slash {{angle brackets|/}}
• 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