[paw-ros-i-tee, poh-, puh-]
noun, plural po·ros·i·ties for 2.
the state or quality of being porous. Geology, Engineering. the ratio, expressed as a percentage, of the volume of the pores or interstices of a substance, as a rock or rock stratum, to the total volume of the mass.
Origin of porosity
1350–1400; Middle English porosytee
< Medieval Latin porōsitās.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for porosity
Historical Examples of porosity
This is due to the absence of pitch and the porosity of the wood.
The porosity of some of the rocks can here be readily distinguished.
It dissolves the cantharidin, and at the same time gives to the collodion film the essential property of porosity.
So in St Johns wort, we may take notice of the form of the leaves and flowers, the porosity of the leaves, the Veins.
Moosehide at best is not water repellent and is good for dry trails and dry snow work because of its porosity.
British Dictionary definitions for porosity
noun plural -ties
the state or condition of being porous
geology the ratio of the volume of space to the total volume of a rock
Word Origin for porosity
C14: from Medieval Latin porōsitās, 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 porosity
late 14c., from Old French porosité, from Medieval Latin porositas, from porus (see pore (n.)).
Online Etymology Dictionary, © 2010 Douglas Harper
The state or property of being porous.
A structure or part that is porous.
A cavity or perforation.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
The condition of being porous.
The ratio of the volume of all the pores in a material to the volume of the whole.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.