siliceous

adjective si·li·ceous \sə-ˈli-shəs\

Definition of SILICEOUS

: of, relating to, or containing silica or a silicate <siliceous limestone>

si·li·ceous also si·li·cious \sə-ˈli-shəs\

Latin siliceus of flint, from silic-, silex hard stone, flint

First Known Use: circa 1656

Medical Dictionary

adjective si·li·ceous

: of, relating to, or containing silica or a silicate <a siliceous cement used in dentistry>

si·li·ceous also si·li·cious \sə-ˈlish-əs\

Next Word in the Dictionary: siliceous sinterPrevious Word in the Dictionary: siliceo-All Words Near: siliceous

What made you want to look up siliceous? Please tell us where you read or heard it (including the quote, if possible).

Put-downs with flair

How to use a word that (literally) drives some people nuts.

Test your vocab with our fun, fast game

Ailurophobia, and 9 other unusual fears