Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun sial

1 sense of sial

Sense 1
sial -- (the granitelike rocks that form the outermost layer of the earth's crust; rich in silicon and aluminum)
       => rock, stone -- (material consisting of the aggregate of minerals like those making up the Earth's crust; "that mountain is solid rock"; "stone is abundant in New England and there are many quarries")