- the assemblage of rocks, rich in silica and alumina, that comprise the continental portions of the upper layer of the earth's crust.
Origin of sial
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- the silicon-rich and aluminium-rich rocks of the earth's continental upper crust, the most abundant individual rock being granite
C20: si (licon) + al (uminium)
- Having or having the characteristics of saliva.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.