sweet pepper

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of numerous varieties of the tropical pepper Capsicum annuum, such as the bell pepper and pimiento, having mild nonpungent fruits.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The fruit of a non-spicy species of pepper, Capsicum annuum. Available in green-, red-, yellow- and orange-skinned varieties (the green is generally the unripe variety and the colored versions the sweeter, ripe fruit).

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun large mild crisp thick-walled capsicum peppers usually bell-shaped or somewhat oblong; commonly used in salads
• noun plant bearing large mild thick-walled usually bell-shaped fruits; the principal salad peppers