Bell pep·per Bot. A species of Capsicum, or Guinea pepper (Capsicum annuum).  It is the red pepper of the gardens.
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  bell pepper
       n 1: plant bearing large mild thick-walled usually bell-shaped
            fruits; the principal salad peppers [syn: sweet pepper,
             pimento, pimiento, paprika, sweet pepper plant,
             Capsicum annuum grossum]
       2: large bell-shaped sweet pepper in green or red or yellow or
          orange or black varieties