Definition of Annotto
1. n. A red or yellowish-red dyeing material, prepared from the pulp surrounding the seeds of a tree (Bixa orellana) belonging to the tropical regions of America. It is used for coloring cheese, butter, etc.
Medical Definition of Annotto
1. Colouring matter extracted from the seeds of Bixa orellana; contains bixin and several other yellow to orange-red pigments; used for colouring butter, margarine, cheese, and oils. (05 Mar 2000)
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