Hyperbolic
Pronunciation : Hy`per*bol"ic, Hy`per*bol"ic*al
Part of Speech : a.
Etymology : [L. hyperbolicus, Gr. hyperbolique.]
Definition : 1. (Math.)
Defn: Belonging to the hyperbola; having the nature of the hyperbola.
2. (Rhet.)
Defn: Relating to, containing, or of the nature of, hyperbole; exaggerating or diminishing beyond the fact; exceeding the truth; as, an hyperbolical expression. "This hyperbolical epitaph." Fuller. Hyperbolic functions (Math.), certain functions which have relations to the hyperbola corresponding to those which sines, cosines, tangents, etc., have to the circle; and hence, called hyperbolic sines, hyperbolic cosines, etc. -- Hyperbolic logarithm. See Logarithm. -- Hyperbolic spiral (Math.), a spiral curve, the law of which is, that the distance from the pole to the generating point varies inversely as the angle swept over by the radius vector.
Source : Webster's Unabridged Dictionary, 1913