1. ad libitum without advance preparation
  2. addlepated stupid and confused
  3. Adiantum cosmopolitan genus of ferns: maidenhair ferns
  4. item-by-item separate and distinct from others of the same kind
  5. ultimatum a final peremptory demand
  6. at bottom in reality
  7. ad infinitum without or seemingly without limit
  8. ad lib without advance preparation
  9. olibanum an aromatic gum resin obtained from various Arabian or East African trees; formerly valued for worship and for embalming and fumigation
  10. stylopodium an enlargement at the base of the style in some Umbelliferae
  11. ad-lib perform without preparation
  12. albite a widely distributed feldspar that forms rocks
  13. albitic of or related to albite feldspar
  14. audibility quality or fact or degree of being audible or perceptible by the ear
  15. edibility the property of being fit to eat
  16. adulator a person who uses flattery
  17. idealism belief that the best possible concepts should be pursued
  18. ibidem in the same place (used when citing a reference)
  19. antilepton the antiparticle of a lepton
  20. Adelgidae plant lice