Egyptian blue (English, noun)
expansion: Egyptian blue (countable and uncountable, plural Egyptian blues)
Senses:
glosses: A pigment made from calcium copper tetrasilicate (“CaCuSi₄O₁₀”), the first artificial pigment, a blue, used by Egyptians for over 3 millennia, before dying out during the Roman Empire; one of the few alternates to lapis lazuli during ancient times.
tags: countable
uncountable
Forms:
form: Egyptian blues
tags: plural