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barrier |
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barrier 1. a. an exposed offshore sand bar separated from the shore by a lagoon b. (as modifier): a barrier beach 2. that part of the Antarctic icecap extending over the sea barrier [′bar·ē·ər] (ecology) Any physical or biological factor that restricts the migration or free movement of individuals or populations. (navigation) Anything which obstructs or prevents passage of a craft. (physics) Barrier [′bar·ē·ər] (ordnance) A passive acoustic detection system for submarines, consisting of hydrophones positioned on the ocean floor and connected by undersea cable to a land-based computer center. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| During ARDS, there is severe damage to the alveolar surfaces, the blood-air barrier becomes leaky, and protein-containing fluid fills the alveoli so that they can no longer conduct gas exchange. |
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