The Simple English Wiktionary has a definition for: sial.

Sial can be the upper layer of the Earth's crust

• Felsic

Sial can also be:

• Sial, Kapurthala, Punjab State, India
• Sial, Khyber Pakhtunkhwa, Pakistan
• Sial Sharif, a small village in Pakistan

• Sial (tribe), a people of Pakistan
• siyal/sial/siala, a people in India

This disambiguation page lists articles associated with the title Sial. If an internal link led you here, you may wish to change the link to point directly to the intended article.