1. blue blood a member of the aristocracy or upper class
  2. blue-blooded belonging to or characteristic of the nobility or aristocracy
  3. blue lotus blue Egyptian lotus: held sacred by the Egyptians
  4. blue-blindness rare form of dichromacy characterized by a lowered sensitivity to blue light resulting in an inability to distinguish blue and yellow
  5. blue-blind inability to see the color blue or to distinguish the colors blue and yellow
  6. bulblet small bulb or bulb-shaped growth arising from the leaf axil or in the place of flowers
  7. bad blood a feeling of ill will arousing active hostility
  8. full blood descent from parents both of one pure breed
  9. blue-black of black tinged with blue
  10. full-blood of unmixed ancestry
  11. bluebird blue North American songbird
  12. pureblood having a list of ancestors as proof of being a purebred animal
  13. Bluebeard a monstrous villain who marries seven women
  14. polyploidy the condition of being polyploid
  15. full-blooded of unmixed ancestry
  16. polyploid of a cell or organism having more than twice the haploid number of chromosomes
  17. liabilities anything that is owed to someone else
  18. whole blood blood that has not been modified except for the addition of an anticoagulant
  19. bluebonnet low-growing annual herb of southwestern United States (Texas) having silky foliage and blue flowers; a leading cause of livestock poisoning in the southwestern United States
  20. bluebottle an annual Eurasian plant cultivated in North America having showy heads of blue or purple or pink or white flowers