# sial

> English word · Noun

## Definitions
1. The rocks rich in silicon and aluminum that form the upper layer of the earth's crust, which lies beneath all continental landmasses.

## Etymology
Coined by Eduard Suess in 1909, in Das Antlitz der Erde, as a blend of translingual Si (silicon) + Al (aluminum).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/sial