adjective
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of, relating to, or containing abundant silica
siliceous deposits
a siliceous clay
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(of plants) growing in or needing soil rich in silica
Other Word Forms
Etymology
Origin of siliceous
First recorded in 1650–60, siliceous is from the Latin word siliceus of flint or limestone. See silex, -eous
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Team members also utilized diatoms, a type of siliceous microalgae preserved within the sediments that is sensitive to changes in salinity, to reconstruct the paleoenvironmental changes that occurred following the 1964 earthquake.
From Science Daily • May 20, 2024
Such balls, called siliceous nodules or “Rokycany Balls,” are weathered out of the shales of the Šárka Formation.
From Science Magazine • Sep. 27, 2023
The monumentally sized, siliceous limestone, stack-rock formation lies at the tip of the Gaspe’ Peninsula, and off the shores of the town of Perce, Canada.
From Washington Times • Sep. 10, 2017
When water is boiled for a long time in a glass vessel a considerable quantity of white siliceous earth is found in the vessel.
From Heroes of Science Chemists by Muir, M. M. Pattison (Matthew Moncrieff Pattison)
Most of the arrow-heads and a good many of the knives were made of a dark reddish siliceous rock.
From Alone with the Hairy Ainu or, 3,800 miles on a pack saddle in Yezo and a cruise to the Kurile Islands. by Landor, A. H. Savage
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
