Very hot and finely tapering pepper of special pungency WordNet 3.0 & Open English WordNet

Chili peppers, from Nahuatl chīlli, are varieties of the berry-fruit of plants from the genus Capsicum, which are members of the nightshade family Solanaceae, cultivated for their pungency. Wikipedia

The spicy fruit of plants in the genus Capsicum; sometimes spelled "chilli" in the UK and "chile" in the southwestern US Wikipedia Disambiguation

A hot pepper, some of which are green Wikipedia Disambiguation

Fruits of plants of the genus Capsicum Wikipedia Disambiguation

Any fruit of a plant of the botanical genus Capsicum, which has a spicy/burning flavour because it contains capsaicin. (Not all chili peppers are particularly spicy, but all true chili peppers contain some capsaicin, in contrast to e.g. the bell pepper, which is not a true chili pepper and does not.). Wiktionary

Fruit. Wiktionary (translation)