This brackish water forms a barrier separating marine and freshwater organisms.
The dog's coat forms a barrier between the environment and the skin.
A p-n junction forms a barrier to conduction between the materials.
Here, rock fracture results in a relative displacement of strata that forms a barrier to petroleum migration.
A linear image is drawn with a thick, honey-colored mixture called resist, which forms a barrier to stop the spread of the dye.
Though costlier than a single share of Apple stock, La Crème's velvet thickness forms a barrier to keep frigid winter out and moisture in.
At a bout, blockers move as one, in pairs or in a foursome that forms a barrier, to prevent the jammer from passing.
The basement membrane, or basal lamina, is a sheet of proteins and other substances to which epithelial cells adhere and that forms a barrier between tissues.
Every plan envisions depressing a stretch of West Street, the seven-lane highway that forms a barrier between the western edge of the trade center site and the World Financial Center and Battery Park City.
Yet Al-Ribat's villagers, driven by poverty, have migrated for centuries -- in recent decades, mostly northward, out of Yemen and across the vast desert known as the Empty Quarter that forms a barrier between here and Saudi Arabia.
The Sheridan, which forms a barrier between poor Puerto Rican and Dominican communities in the South Bronx and the Bronx River, was a particular brutal example of Robert Moses' urban renewal projects.
