sial [sahy-al] ExamplesWord Origin noun Geology.
- the assemblage of rocks, rich in silica and alumina, that comprise the continental portions of the upper layer of the earth’s crust.
During the Mutiny of 1857 the Sial leader again proved his loyalty by serving in person on the British side.
Sialogogue, sī-al′o-gog, n. a drug which increases the secretion of saliva—also Sial′agogue.
British Dictionary definitions for sial sial noun
- the silicon-rich and aluminium-rich rocks of the earth’s continental upper crust, the most abundant individual rock being granite
Derived Formssialic (saɪˈælɪk), adjectiveWord Origin for sial C20: si (licon) + al (uminium)