| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 1,805,811,188 visitors served. |
|
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
barrier |
Also found in: Dictionary/thesaurus, Medical, Legal, Wikipedia | 0.03 sec. |
|
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. |
|
| ? Mentioned in | ? References in periodicals archive | ||
|---|---|---|---|
| It is known that ozone and its reaction products can cross the blood-gas barrier and enter the bloodstream, and exposure to ozone can cause oxidative stress, which has been shown to disrupt testicular and sperm function. Type II alveolar cells also can turn into type I alveolar cells, which form the thin, blood-gas barrier through which gas exchange occurs during respiration. |
| Encyclopedia |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup | Partner with us |
|---|