anatto vs annatto

anatto

annatto

noun
  • 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. 

  • An orange-red dye obtained from this seed. 

How often have the words anatto and annatto occurred in a corpus of books? (source: Google Ngram Viewer )