pencil lead

[ˈpɛnsəl lid]

Definition:
1. Mixture of graphite with clay in different degrees of hardness.

'pencil lead' example sentence:

1. A discovery made from pencil lead is promising to change the future of the electronics industry.
2. Do you think pencil lead will wash out of this white shirt?
3. The location analysis results of the pencil lead breaking test on thermal barrier coating showed the accuracy of this method.
4. Each one was grooved to half the thickness of a pencil lead. Two slats were glued together with the lead between.
5. Health professionals currently lead the main box and pencil lead.
6. The color of an HB pencil lead is too light to be read by the machine.
7. I'm out of pencil lead.
8. Experiments were carried out on sheet metal with the signal of pencil lead breaking as simulating source.
9. The pencil lead is broken.