A point where a curve intersects itself, with two different branches of the curve passing through the point in different directions; a self-intersection of a curve.
From Medieval Latin crux (cross) + nodus (knot), literally 'cross-knot.' Coined in mathematical terminology in the 17th-18th centuries to describe this geometric property.
The figure-eight shape you can draw without lifting your pencil has two crunodes—one at the top and one at the bottom—making it a beautiful geometric example of mathematical terminology!
Complete word intelligence in one call. Free tier — 50 lookups/day.