1. azido group the univalent group N3- derived from hydrazoic acid
  2. azo group the bivalent group -N=N- united to two hydrocarbon groups
  3. elite group a group or class of persons enjoying superior intellectual or social or economic status
  4. acyl group any group or radical of the form RCO- where R is an organic group
  5. jazz group a small band of jazz musicians
  6. acetyl group the organic group of acetic acid (CH3CO-)
  7. as a group all together
  8. amino group the radical -NH2
  9. Adapid group extinct small mostly diurnal lower primates that fed on leaves and fruit; abundant in North America and Europe 30 to 50 million years ago; their descendents probably include the lemurs; some authorities consider them ancestral to anthropoids but others consider them only cousins
  10. air group a unit of the United States Air Force larger than a squadron and smaller than a wing
  11. basidiocarp the fruiting body of a basidiomycete which bears its spores on special cells
  12. cyanide group the monovalent group -CN in a chemical compound
  13. ABO group a classification system for the antigens of human blood
  14. endocarp the hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed
  15. blood group human blood cells that have the same antigens
  16. allyl group the univalent unsaturated organic radical C3H5
  17. cyano group the monovalent group -CN in a chemical compound
  18. age group a group of people having approximately the same age
  19. intragroup occurring within an institution or community
  20. aristocracy a privileged class holding hereditary titles