or si·li·cious

[ suh-lish-uh s ]
/ səˈlɪʃ əs /


containing, consisting of, or resembling silica.
growing in soil rich in silica.

Origin of siliceous

First recorded in 1650–60, siliceous is from the Latin word siliceus of flint or limestone. See silex, -eous

Related forms

non·si·li·ceous, adjectivenon·si·li·cious, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for siliceous

British Dictionary definitions for siliceous



/ (sɪˈlɪʃəs) /


of, relating to, or containing abundant silicasiliceous deposits; a siliceous clay
(of plants) growing in or needing soil rich in silica
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for siliceous


[ sĭ-lĭshəs ]

Resembling or containing silica.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.