cit ‧ rus /ˈsɪtrəs/ BrE AmE noun [countable]
[ Date: 1800-1900 ; Language: Modern Latin ; Origin: Latin , 'citron tree' ]
1 . ( also ˈcitrus tree ) a type of tree that produces citrus fruits
2 . ( also ˈcitrus fruit ) a fruit with thick skin, such as an orange or ↑ lemon
—citrus adjective