Meaning of the word "black lead" in English

What does "black lead" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

black lead

US /blæk lɛd/
UK /blæk lɛd/

Noun

a soft, dark gray form of carbon, also known as graphite, used in pencils and as a lubricant

Example:
Pencils are made with black lead, not actual lead.
The artist used a stick of black lead for the preliminary sketch.