Dictionary Suite
Multi-word Results
barrier island a long narrow sandy island formed parallel to a shore protecting it from erosion.
barrier reef a ridge of coral running parallel to a coast.
color barrier unspoken social code of racial segregation or discrimination, esp. in sports, education, public service, and the like.
Great Barrier Reef the largest coral reef system in the world, located in the Coral Sea off the northeastern coast of Australia.
sonic barrier the large increase in aerodynamic resistance experienced by aircraft approaching the speed of sound; sound barrier.
sound barrier a hypothetical barrier to aircraft as they approach the speed of sound, suggested by the abrupt increase in aerodynamic drag near that velocity; sonic barrier.
thermal barrier the maximum flight speed of a given supersonic aircraft in the atmosphere that is set by aerodynamic heating effects.