It's the pronunciation of the Egyptian word mśdmt, that means "antimony", a chimical element. This pronunciation is not certain, but comes from an Arabic tradition
There was Kohl,henna,mesdemet,udju... there ya go!
The ancient Egyptians referred to the pigment we now know as kohl as "mesdemet." This dark powder was primarily made from minerals like galena and was used to enhance the eyes for both cosmetic and protective purposes. It was believed to ward off evil spirits and reduce glare from the sun, making it an essential part of their beauty and health rituals.