Cosmetic products applied to the edges of eyelids to define or accent the eyes, typically available in pencil, liquid, or powder form.
From 'eye' (Old English 'ēge') + 'liner' (from Latin 'linea' meaning line). The term emerged in the early 20th century as makeup products became commercialized.
Eyeliner is one of humanity's oldest beauty practices—ancient Egyptians used kohl around 4000 BCE, not just for looks but as sunscreen and to prevent eye infections in the desert.
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