1. brake drum a hollow cast-iron cylinder attached to the wheel that forms part of the brakes
  2. bongo drum a small drum; played with the hands
  3. basket rummy a form of rummy using two decks of cards and four jokers
  4. break through pass through (a barrier)
  5. breakthrough the act of making an important discovery
  6. pyrethrum white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum
  7. Pyrethrum used in former classifications for plants later placed in genus Chrysanthemum and now often included in genus Tanacetum
  8. brake disk a disk or plate that is fixed to the wheel
  9. plectrum a small thin device used to pluck a stringed instrument
  10. bass drum a large drum with two heads
  11. Hyracotherium extinct horse genus; formerly called eohippus
  12. break water show the fins above the water while swimming
  13. brook trout North American freshwater trout; introduced in Europe
  14. breakwater a protective structure of stone or concrete
  15. brigadier a general officer ranking below a major general
  16. placoderm fish-like vertebrate with bony plates on head and upper body
  17. pargetry ornamental plasterwork
  18. bracket creep a movement into a higher tax bracket as taxable income increases
  19. Brigate Rosse a Marxist-Leninist terrorist organization that arose out of a student protest movement in the late 1960s; wants to separate Italy from NATO and advocates violence in the service of class warfare and revolution; mostly inactive since 1989
  20. parqueterie a patterned wood inlay used to cover a floor

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