Glossary

B

BIA Bureau of Indian Affairs (DoI)

bioreactor An advanced tissue culturing apparatus

black hole A completely collapsed, massive dead star whose gravitational field is so powerful that no radiation can escape from it; because of this property, its existence must be inferred rather than recorded from radiation emissions

BMDO Ballistic Missile Defense Organization (formerly SDIO)

boreal Northern

boundary layer A layer of fluid, close to the surface of a body placed in a moving stream, that is distinguishable from the main airflow by distinctive flow characteristics of its own caused by friction