chalk

باللغة العربية: طَبْشُورَة

1. A soft, white, powdery limestone (calcium carbonate, CaCO₃). (uncountable) · chalk cliffs are not recommended for climbing
2. A piece of chalk, or nowadays processed compressed gypsum (calcium sulfate, CaSO₄), that is used for drawing and for writing on a blackboard (chalkboard). (countable)
3. Tailor's chalk. (countable)
4. A white powdery substance used to prevent hands slipping from holds when climbing, or losing grip in weight-lifting or gymnastics, sometimes but not always limestone-chalk, often magnesium carbonate (MgCO₃). (uncountable) · when working out your next move, it's a good idea to get some more chalk from the bag
5. A platoon-sized group of airborne soldiers. (US, countable)
6. The favorite in a sporting event. (US, countable, uncountable)
7. The prediction that there will be no upsets, and the favored competitor will win. (US, countable, uncountable)

الجمع chalks