Robert P. Munafo, 1999 Feb 2.
It is common (though technically inaccurate) to refer to a complex number as a "point", since the complex number corresponds to a point on the complex plane. If the complex number is a + b i, the coordinates of the point are a and b.
From the Mandelbrot Set Glossary and Encyclopedia, by Robert Munafo, (c) 1987-2018. Mu-ency index
This page was written in the "embarrassingly readable" markup language RHTF, and was last updated on 2018 Feb 04. s.11