Try Our Apps


Gobble up these 8 terms for eating


[paw-ros-i-tee, poh-, puh-] /pɔˈrɒs ɪ ti, poʊ-, pə-/
noun, plural porosities 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. See porous, -ity Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the Web for porosity
Historical Examples
British Dictionary definitions for porosity


noun (pl) -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
C14: from Medieval Latin porōsitās, from Late Latin poruspore²
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
Cite This Source
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
Cite This Source
porosity in Medicine

porosity po·ros·i·ty (pə-rŏs'ĭ-tē, pô-)

  1. The state or property of being porous.

  2. A structure or part that is porous.

  3. A cavity or perforation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
porosity in Science
  (pə-rŏs'ĭ-tē, pô-)   
  1. The condition of being porous.

  2. The ratio of the volume of all the pores in a material to the volume of the whole.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Word Value for porosity

Scrabble Words With Friends

Nearby words for porosity