branch point

noun
  1. Electricity. a point in an electric network at which three or more conductors meet.
  2. Mathematics. a point such that analytic continuation of a given function of a complex variable in a small neighborhood of the point produces a different functional value at the point.

Origin of branch point

First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018