penetrable

American Heritage Dictionary:

pen·e·tra·ble

(pĕn'ĭ-trə-bəl) pronunciation

adj.
Capable of being penetrated: penetrable defenses; a penetrable wall.

penetrability pen'e·tra·bil'i·ty n.
penetrably pen'e·tra·bly adv.

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Antonyms by Answers.com:

penetrable

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adj

Definition: permeable
Antonyms: impenetrable, impervious

adj

Definition: understandable
Antonyms: incomprehensible

Mosby's Dental Dictionary:

penetrability

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(pen′ə-trə-bil′i-tē)
n

The ability of a beam of x-radiation to pass through matter. The degree of penetrability is determined by kilo-voltage and filtration.

Related topics:

	transaudient
	transcalent
	translucent

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Copyrights:

		American Heritage Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved. Read more
		Antonyms by Answers.com. © 1999-present by Answers Corporation. All rights reserved. Read more
		Mosby's Dental Dictionary. Mosby's Dental Dictionary. Copyright © 2004 by Elsevier, Inc. All rights reserved. Read more