Definitions

1. noun

a historical term for antimony, a toxic chemical element with the symbol Sb, or a cosmetic made from antimony, used to darken eyelids and eyebrows.

“The ancient Egyptians used stibium to create eye makeup.”

2. historical term

an old-fashioned or obsolete term for antimony or its compounds.

“The alchemist used stibium to create a new compound.”