Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Previous word: Si Kiang
Next word: sialid
Definition of: sial
(sī′al) noun Geol.
A rock formation rich in silica and alumina which underlies sedimentary rock in continental land masses.
—si·al′ic adjective [<SI(LICA) + AL(UMINA)]
Comment about this word, ask questions, or add new information about this topic: