hoodia Syllabification: (hood·i·a)Pronunciation: /ˈho͝odēə/Definition of hoodia noun a southern African cactus from which a compound that acts as an appetite suppressant is derived. Genus Hoodia, family Asclepiadaceae; about 20 species Origin:from modern Latin Hoodia, from Hood, the name of an English plant growerhoodia in other Oxford dictionaries Definition of hoodia in the British & World English dictionary