Is “Sial” a Scrabble word?
Yes
SIAL
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Sial
noun
1.The rocks rich in silicon and aluminum that form the upper layer of the earth's crust, which lies beneath all continental landmasses.