The chili pepper (also chile, chile pepper, chilli pepper, or chilli), from Nahuatl chīlli Nahuatl pronunciation (About this soundlisten) is the fruit of plants from the genus Capsicum which are members of the nightshade family, Solanaceae. Chili peppers are widely used in many cuisines as a spice to add heat to dishes. The substances giving chili peppers their intensity when ingested or applied topically are capsaicin and related compounds known as capsaicinoids.  

The chili pepper (also chile, chile pepper, chilli pepper, or chilli), from Nahuatl chīlli Nahuatl pronunciation (About this soundlisten) is the fruit of plants from the genus Capsicum which are members of the nightshade family, Solanaceae. Chili peppers are widely used in many cuisines as a spice to add heat to dishes. The substances giving chili peppers their intensity when ingested or applied topically are capsaicin and related compounds known as capsaicinoids.