hyperbolic function

WordReference Random House Unabridged Dictionary of American English © 2025

hy′perbol′ic func′tion, [Math.]

1. Mathematics a function of an angle expressed as a relationship between the distances from a point on a hyperbola to the origin and to the coordinate axes, as hyperbolic sine or hyperbolic cosine: often expressed as combinations of exponential functions.

• 1885–90

Collins Concise English Dictionary © HarperCollins Publishers::

hyperbolic function noun

1. any of a group of functions of an angle expressed as a relationship between the distances of a point on a hyperbola to the origin and to the coordinate axes. The group includes sinh (hyperbolic sine), cosh (hyperbolic cosine), tanh (hyperbolic tangent), sech (hyperbolic secant), cosech (hyperbolic cosecant), and coth (hyperbolic cotangent)