1. black belt a black sash worn to show expert standards in the martial arts (judo or karate)
  2. black bile a humor that was once believed to be secreted by the kidneys or spleen and to cause sadness and melancholy
  3. blackball vote against; refuse to endorse; refuse to assent
  4. black bead erect shrub with small if any spines having racemes of white to yellow flowers followed by curved pointed pods and black shiny seeds; West Indies and Florida
  5. black bread bread made of coarse rye flour
  6. blackbeetle dark brown cockroach originally from orient now nearly cosmopolitan in distribution
  7. blackbird common black European thrush
  8. black body a hypothetical object capable of absorbing all the electromagnetic radiation falling on it
  9. black lead used as a lubricant and as a moderator in nuclear reactors
  10. blackbody a hypothetical object capable of absorbing all the electromagnetic radiation falling on it
  11. Blackbeard an English pirate who operated in the Caribbean and off the Atlantic coast of North America (died in 1718)
  12. blacklead cover with graphite
  13. blackpoll North American warbler having a black-and-white head
  14. Blackpool a resort town in Lancashire in northwestern England on the Irish Sea; famous for its tower
  15. blackboard sheet of slate; for writing with chalk
  16. placable easily calmed or pacified
  17. black opal a dark colored opal with internal reflections of green or red
  18. black bear brown to black North American bear
  19. black bean black-seeded bean of South America; usually dried
  20. lag bolt a heavy woodscrew with a square or hexagonal head that is driven in with a wrench