[pawr-uh s, pohr-]
- full of pores.
- permeable by water, air, etc.
Origin of porous
SynonymsSee more synonyms on Thesaurus.com
2. penetrable, pervious, sievelike, riddled.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for porousness
That softness and porousness may be retained in a very easy way.Papers on Health
Several Experiments to prove the porousness of Marble, and some other Stones.
Experiments to prove the porousness of the skin of Vegetables.
The porousness of the rocks allows it to pass under ground to the sea.The Exploring Expedition to the Rocky Mountains, Oregon and California
Brevet Col. J.C. Fremont
It can be so woven as to be almost as porous as wool, and to retain that porousness even when saturated with perspiration.A Handbook of Health</p>
- permeable to water, air, or other fluids
- biology geology having pores; poriferous
- easy to cross or penetratethe porous border into Thailand; the most porous defence in the league
C14: from Medieval Latin porōsus, from Late Latin porus pore ²
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
Word Origin and History for porousness
late 14c., "full of pores," from Old French poros (14c., Modern French poreux), from Medieval Latin porosus; or directly from Latin porus "an opening" (see pore (n.)). Figurative use from 1640s.
Online Etymology Dictionary, © 2010 Douglas Harper
- Full of or having pores.
- Admitting the passage of gas or liquid through pores.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- Having many pores or other small spaces that can hold a gas or liquid or allow it to pass through.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.