bel ‧ la ‧ don ‧ na /ˌbeləˈdɒnə $ -ˈdɑːnə/ BrE AmE noun [uncountable]
[ Date: 1700-1800 ; Language: Italian ; Origin: 'beautiful lady' ; because it was used in cosmetics ]
1 . a poisonous plant SYN deadly nightshade
2 . a substance from this plant, used as a drug