Advertisement

Advertisement

sial

[ sahy-al ]

noun

, Geology.
  1. the assemblage of rocks, rich in silica and alumina, that comprise the continental portions of the upper layer of the earth's crust.


sial

/ saɪˈælɪk; ˈsaɪəl /

noun

  1. the silicon-rich and aluminium-rich rocks of the earth's continental upper crust, the most abundant individual rock being granite


Discover More

Derived Forms

  • sialic, adjective

Discover More

Other Words From

  • si·alic adjective

Discover More

Word History and Origins

Origin of sial1

1920–25; < German, equivalent to Si ( licium ) silicium + Al ( uminium ) aluminum

Discover More

Word History and Origins

Origin of sial1

C20: si ( licon ) + al ( uminium )

Discover More

Example Sentences

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.

Advertisement

Word of the Day

absquatulate

[ab-skwoch-uh-leyt ]

Meaning and examples

Start each day with the Word of the Day in your inbox!

By clicking "Sign Up", you are accepting Dictionary.com Terms & Conditions and Privacy Policies.

Advertisement

Advertisement

Advertisement