Definitions

1. noun

a person or thing that separates or serves to separate

“The separatrix between the two countries has long been a point of contention.”

2. noun

a curve or surface in mathematics that separates two regions

“The separatrix in the dynamical system played a crucial role in understanding the behavior of the particles.”

3. noun

a molecule or ion that is involved in the separation of two different substances

“The separatrix in the chromatography process helped to purify the compound.”