Cayenne \Cay*enne\, n. [From Cayenne, a town and island in French Guiana, South America.]

Cayenne pepper.

Cayenne pepper.
   (a) (Bot.) A species of Capsicum (C. frutescens) with small and intensely pungent fruit.
   (b) A very pungent spice made by drying and grinding the fruits or seeds of several species of the genus Capsicum, esp. C. annuum and C. Frutescens; -- called also red pepper. It is used chiefly as a condiment.

Source: Webster's Revised Unabridged Dictionary (1913)