What is the meaning of Annatto?

A tropical American evergreen shrub, Bixa orellana; the lipstick tree; the fruit of the tree.

The seed of this tree used as a colouring or in Latin American cooking, containing bixin.

A fugitive orange-red dye obtained from this seed and fruit pulp through maceration and fermentation, used as textile dye and skin dye, containing bixin.

annatto (plant and dye)

annatto (dye)

Source: wiktionary.org