Dictionary.net

• kär'tha-min, n. a dye obtained in crystals by a chemical process from safflower. [Low L. carthamus--Ar. qartum, saffron.]

1908 - Chambers's Twentieth Century Dictionary of the English Language
By Thomas Davidson

• (Chem.) The colouring matter of safflower [L. L.]. Alkalies change it from red to yellow.

1895 - Glossary of terms and phrases
By Henry Percy Smith