permeable

[pur-mee-uh-buhl]
adjective
capable of being permeated.

Origin:
1400–50; late Middle English < Late Latin permeābilis, equivalent to permeā(re) to permeate + -bilis -ble

permeableness, noun
permeably, adverb
nonpermeable, adjective
unpermeable, adjective
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World English Dictionary
permeable (ˈpɜːmɪəbəl)
 
adj
capable of being permeated, esp by liquids
 
[C15: from Late Latin permeābilis, from Latin permeāre to pervade; see permeate]
 
'permeableness
 
n
 
'permeably
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

permeable
early 15c., from L. permeabilis "that can be passed through, passable," from L. permeare "to pass through," from per- "through" + meare "to pass," from PIE base *mei-/*moi- "to change" (see mutable).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

permeable per·me·a·ble (pûr'mē-ə-bəl)
adj.
That can be permeated or penetrated, especially by liquids or gases.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
permeable   (pûr'mē-ə-bəl)  Pronunciation Key 
Capable of being passed through or permeated, especially by liquids or gases.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Porous materials are, probably, just more permeable.
Yet the line is certainly permeable.
They may include planting trees in a parking lot or paving with permeable
  materials to minimize heat and storm-water runoff.
But to get the heat out you have to make them permeable.
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