annattoPronunciation: /əˈnatəʊ/ (also anatto)Definition of annatto noun (plural annattos) 1 [mass noun] an orange-red dye obtained from the seed coat of a tropical fruit, used for colouring foods. 2the tropical American tree that yields the fruit from which annatto is obtained. Bixa orellana, family Bixaceae Origin: early 17th century: from Caribannatto in other Oxford dictionaries Definition of annatto in the US English dictionary
