From Longman Dictionary of Contemporary Englishcapsicumcap‧si‧cum /ˈkæpsɪkəm/ noun [countable, uncountable] 
HBPDF technical a kind of pepper (=a green, red, or yellow vegetable)
HBPDF technical a kind of pepper (=a green, red, or yellow vegetable)Examples from the Corpus
capsicum• Like most other plant surfaces the surface of a pepper or capsicum has stomata.Origin capsicum (1500-1600) Modern Latin perhaps from Latin capsa; → CASE1 