Science Dictionary
asbestos   (ās-běs'təs)  Pronunciation Key 
Any of several fibrous mineral forms of magnesium silicate. Asbestos is resistant to heat, flames, and chemical action. Some forms have been shown to cause lung diseases. For this reason, asbestos is no longer used to make insulation, fireproofing material, and brake linings.
American Heritage
Science Dictionary
asbestosis   (ās'běs-tō'sĭs)  Pronunciation Key 
A chronic, progressive lung disease caused by prolonged inhalation of asbestos particles.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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