si·al (s   l )n. Rock rich in silicon and aluminum forming the upper layer of the earth's crust beneath all continental landmasses. [si(licon) + al(uminum).] |
sial [ˈsaɪəl]
n
(Earth Sciences / Geological Science) the silicon-rich and aluminium-rich rocks of the earth's continental upper crust, the most abundant individual rock being granite
[si(licon) + al(uminium)]
sialic [saɪˈælɪk] adj
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  sial - the granitelike rocks that form the outermost layer of the earth's crust; rich in silicon and aluminumcrust, Earth's crust - the outer layer of the Earth |
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