Sial
4 lettersnounrareUpdated June 2026
Definition
The granitelike rock that forms the outermost layer of the Earth's crust, characterised by high concentrations of silicon and aluminium.
“Continental landmasses are composed primarily of sial floating above the denser sima beneath.”
Pronunciation
Syllables
si·al
Related Words
Antonyms
Word Game Tips
Wordle
Vowel-heavy with I and A flanking the consonants, the SI start is a useful pattern to test.
Scrabble
Worth 4 points, a technical geology term but entirely valid, useful for awkward vowel-heavy racks.
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